485BPOS

Registration Nos. 002-12171/811-696

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, DC 20549
FORM N-1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 /X/

Post-Effective Amendment No. 109 /X/

and/or

REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940 /X/

Amendment No. 107 /X/

T. ROWE PRICE SMALL-CAP STOCK FUND, INC.

Exact Name of Registrant as Specified in Charter

100 East Pratt Street, Baltimore, Maryland 21202
Address of Principal Executive Offices

410-345-2000
Registrant’s Telephone Number, Including Area Code

David Oestreicher

100 East Pratt Street, Baltimore, Maryland 21202
Name and Address of Agent for Service

It is proposed that this filing will become effective (check appropriate box):

/X/Immediately upon filing pursuant to paragraph (b)

//On (date) pursuant to paragraph (b)

//60 days after filing pursuant to paragraph (a)(1)

//On (date) pursuant to paragraph (a)(1)

//75 days after filing pursuant to paragraph (a)(2)

//On (date) pursuant to paragraph (a)(2) of Rule 485

If appropriate, check the following box:

//This post-effective amendment designates a new effective date for a previously filed post-effective amendment.

Page 2

EXHIBITS

Exhibit	Exhibit No.
XBRL Instance Document	EX-101.INS
XBRL Taxonomy Extension Schema Document	EX-101.SCH
XBRL Taxonomy Extension Calculation Linkbase Document	EX-101.CAL
XBRL Taxonomy Extension Definition Linkbase Document	EX-101.DEF
XBRL Taxonomy Extension Labels Linkbase Document	EX-101.LAB
XBRL Taxonomy Extension Presentation Linkbase Document	EX-101.PRE

Page 3

Pursuant to the requirements of the Securities Act of 1933, as amended, and the Investment Company Act of 1940, as amended, the Registrant certifies that it meets all of the requirements for effectiveness of this Registration Statement pursuant to Rule 485(b) under the Securities Act of 1933 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, duly authorized, in the City of Baltimore, State of Maryland, this May 18, 2012.

T. ROWE PRICE SMALL-CAP STOCK FUND, INC.

/s/Edward C. Bernard

By:Edward C. Bernard

Chairman of the Board

Pursuant to the requirements of the Securities Act of 1933, as amended, this Registration Statement has been signed below by the following persons in the capacities and on the dates indicated:

Signature	Title	Date
/s/Edward C. Bernard	Chairman of the Board	May 18, 2012
Edward C. Bernard	(Chief Executive Officer)
/s/Gregory K. Hinkle	Treasurer (Chief	May 18, 2012
Gregory K. Hinkle	Financial Officer)
*	Director	May 18, 2012
William R. Brody
*	Director	May 18, 2012
Jeremiah E. Casey
*	Director	May 18, 2012
Anthony W. Deering
*	Director	May 18, 2012
Donald W. Dick, Jr.
*	Director	May 18, 2012
Karen N. Horn
/s/John H. Laporte	Director	May 18, 2012
John H. Laporte
*	Director	May 18, 2012
Theo C. Rodgers

Page 4

*	Director	May 18, 2012
John G. Schreiber
*	Director	May 18, 2012
Mark. R. Tercek
*/s/David Oestreicher	Vice President and	May 18, 2012
David Oestreicher	Attorney-In-Fact

Page 5

T. ROWE PRICE BALANCED FUND, INC.

T. ROWE PRICE BLUE CHIP GROWTH FUND, INC.

T. ROWE PRICE CALIFORNIA TAX-FREE INCOME TRUST

T. ROWE PRICE CAPITAL APPRECIATION FUND

T. ROWE PRICE CAPITAL OPPORTUNITY FUND, INC.

T. ROWE PRICE CORPORATE INCOME FUND, INC.

T. ROWE PRICE DIVERSIFIED MID-CAP GROWTH FUND, INC.

T. ROWE PRICE DIVERSIFIED SMALL-CAP GROWTH FUND, INC.

T. ROWE PRICE DIVIDEND GROWTH FUND, INC.

T. ROWE PRICE EQUITY INCOME FUND

T. ROWE PRICE EQUITY SERIES, INC.

T. ROWE PRICE FINANCIAL SERVICES FUND, INC.

T. ROWE PRICE FIXED INCOME SERIES, INC.

T. ROWE PRICE FLOATING RATE FUND, INC.

T. ROWE PRICE GLOBAL REAL ESTATE FUND, INC.

T. ROWE PRICE GLOBAL TECHNOLOGY FUND, INC.

T. ROWE PRICE GNMA FUND

T. ROWE PRICE GROWTH & INCOME FUND, INC.

T. ROWE PRICE GROWTH STOCK FUND, INC.

T. ROWE PRICE HEALTH SCIENCES FUND, INC.

T. ROWE PRICE HIGH YIELD FUND, INC.

T. ROWE PRICE INDEX TRUST, INC.

T. ROWE PRICE INFLATION FOCUSED BOND FUND, INC.

T. ROWE PRICE INFLATION PROTECTED BOND FUND, INC.

T. ROWE PRICE INSTITUTIONAL EQUITY FUNDS, INC.

T. ROWE PRICE INSTITUTIONAL INCOME FUNDS, INC.

T. ROWE PRICE INSTITUTIONAL INTERNATIONAL FUNDS, INC.

T. ROWE PRICE INTERNATIONAL FUNDS, INC.

T. ROWE PRICE INTERNATIONAL INDEX FUND, INC.

T. ROWE PRICE INTERNATIONAL SERIES, INC.

T. ROWE PRICE MEDIA & TELECOMMUNICATIONS FUND, INC.

T. ROWE PRICE MID-CAP GROWTH FUND, INC.

T. ROWE PRICE MID-CAP VALUE FUND, INC.

T. ROWE PRICE MULTI-SECTOR ACCOUNT PORTFOLIOS, INC.

T. ROWE PRICE NEW AMERICA GROWTH FUND
T. ROWE PRICE NEW ERA FUND, INC.

T. ROWE PRICE NEW HORIZONS FUND, INC.

T. ROWE PRICE NEW INCOME FUND, INC.

T. ROWE PRICE PERSONAL STRATEGY FUNDS, INC.

T. ROWE PRICE PRIME RESERVE FUND, INC.

T. ROWE PRICE REAL ASSETS FUND, INC.

T. ROWE PRICE REAL ESTATE FUND, INC.

T. ROWE PRICE RESERVE INVESTMENT FUNDS, INC.

T. ROWE PRICE RETIREMENT FUNDS, INC.

T. ROWE PRICE SCIENCE & TECHNOLOGY FUND, INC.

T. ROWE PRICE SHORT-TERM BOND FUND, INC.

T. ROWE PRICE SMALL-CAP STOCK FUND, INC.

T. ROWE PRICE SMALL-CAP VALUE FUND, INC.

T. ROWE PRICE SPECTRUM FUND, INC.

T. ROWE PRICE STATE TAX-FREE INCOME TRUST

Page 6

T. ROWE PRICE STRATEGIC INCOME FUND, INC.

T. ROWE PRICE SUMMIT FUNDS, INC.

T. ROWE PRICE SUMMIT MUNICIPAL FUNDS, INC.

T. ROWE PRICE TAX-EFFICIENT FUNDS, INC.

T. ROWE PRICE TAX-EXEMPT MONEY FUND, INC.

T. ROWE PRICE TAX-FREE HIGH YIELD FUND, INC.

T. ROWE PRICE TAX-FREE INCOME FUND, INC.

T. ROWE PRICE TAX-FREE SHORT-INTERMEDIATE FUND, INC.

T. ROWE PRICE U.S. BOND ENHANCED INDEX FUND, INC.

T. ROWE PRICE U.S. LARGE-CAP CORE FUND, INC.

T. ROWE PRICE U.S. TREASURY FUNDS, INC.

T. ROWE PRICE VALUE FUND, INC.

POWER OF ATTORNEY

RESOLVED, that the Corporation does hereby constitute and authorize Edward C. Bernard, Margery K. Neale and David Oestreicher, and each of them individually, their true and lawful attorneys and agents to take any and all action and execute any and all instruments which said attorneys and agents may deem necessary or advisable to enable the Corporation/Trust to comply with the Securities Act of 1933, as amended, and the Investment Company Act of 1940, as amended, and any rules, regulations, orders or other requirements of the United States Securities and Exchange Commission thereunder, in connection with the registration under the Securities Act of 1933, as amended, of shares of the Corporation/Trust, to be offered by the Corporation/Trust, and the registration of the Corporation/Trust under the Investment Company Act of 1940, as amended, including specifically, but without limitation of the foregoing, power and authority to sign the name of the Corporation/Trust on its behalf, and to sign the names of each of such directors/trustees and officers on his behalf as such director/trustee or officer to any (i) Registration Statement on Form N-1A or N-14 of the Corporation/Trust filed with the Securities and Exchange Commission under the Securities Act of 1933, as amended; (ii) Registration Statement on Form N-1A or N-14 of the Corporation/Trust under the Investment Company Act of 1940, as amended; (iii) amendment or supplement (including, but not limited to, Post-Effective Amendments adding additional series or classes of the Corporation/ Trust) to said Registration Statement; and (iv) instruments or documents filed or to be filed as a part of or in connection with such Registration Statement, including Articles Supplementary, Articles of Amendment, and other instruments with respect to the Articles of Incorporation or Master Trust Agreement of the Corporation/Trust.

IN WITNESS WHEREOF, the above named Corporations/Trusts have caused these presents to be signed and the same attested by its Secretary, each thereunto duly authorized by its Board of Directors/Trustees, and each of the undersigned has hereunto set his hand and seal as of the day set opposite his name.

Page 7

ALL CORPORATIONS/TRUSTS
/s/Edward C. Bernard Edward C. Bernard	Chairman of the Board (Principal Executive Officer) Director/Trustee	April 24, 2012
/s/Gregory K. Hinkle Gregory K. Hinkle	Treasurer (Principal Financial Officer)	April 24, 2012
/s/William R. Brody William R. Brody	Director/Trustee	April 24, 2012
/s/Jeremiah E. Casey Jeremiah E. Casey	Director/Trustee	April 24, 2012
/s/Anthony W. Deering Anthony W. Deering	Director/Trustee	April 24, 2012
/s/Donald W. Dick, Jr. Donald W. Dick, Jr.	Director/Trustee	April 24, 2012
/s/Karen N. Horn Karen N. Horn	Director/Trustee	April 24, 2012
/s/Theo C. Rodgers Theo C. Rodgers	Director/Trustee	April 24, 2012
/s/John G. Schreiber John G. Schreiber	Director/Trustee	April 24, 2012
/s/Mark R. Tercek Mark R. Tercek	Director/Trustee	April 24, 2012

(Signatures Continued)

Page 8

MICHAEL C. GITLIN, Director/Trustee

T. ROWE PRICE CALIFORNIA TAX-FREE INCOME TRUST

T. ROWE PRICE CORPORATE INCOME FUND, INC.

T. ROWE PRICE FIXED INCOME SERIES, INC.

T. ROWE PRICE GNMA FUND

T. ROWE PRICE FLOATING RATE FUND, INC.

T. ROWE PRICE HIGH YIELD FUND, INC.

T. ROWE PRICE INSTITUTIONAL INCOME FUNDS, INC.

T. ROWE PRICE INFLATION FOCUSED BOND FUND, INC.

T. ROWE PRICE INFLATION PROTECTED BOND FUND, INC.

T. ROWE PRICE NEW INCOME FUND, INC.

T. ROWE PRICE PRIME RESERVE FUND, INC.

T. ROWE PRICE RESERVE INVESTMENT FUNDS, INC.

T. ROWE PRICE SHORT-TERM BOND FUND, INC.

T. ROWE PRICE STATE TAX-FREE INCOME TRUST

T. ROWE PRICE STRATEGIC INCOME FUND, INC.

T. ROWE PRICE SUMMIT FUNDS, INC.

T. ROWE PRICE SUMMIT MUNICIPAL FUNDS, INC.

T. ROWE PRICE TAX-EXEMPT MONEY FUND, INC.

T. ROWE PRICE TAX-FREE HIGH YIELD FUND, INC.

T. ROWE PRICE TAX-FREE INCOME FUND, INC.

T. ROWE PRICE TAX-FREE SHORT-INTERMEDIATE FUND, INC.

T. ROWE PRICE U.S. BOND ENHANCED INDEX FUND, INC.

T. ROWE PRICE U.S. TREASURY FUNDS, INC.

MICHAEL C. GITLIN, Director and President

T. ROWE PRICE MULTI-SECTOR ACCOUNT PORTFOLIOS, INC.

/s/Michael C. Gitlin Michael C. Gitlin April 24, 2012

(Signatures Continued)

Page 9

JOHN H. LAPORTE, Director/Trustee

T. ROWE PRICE CAPITAL OPPORTUNITY FUND, INC.

T. ROWE PRICE DIVERSIFIED MID-CAP GROWTH FUND, INC.

T. ROWE PRICE EQUITY SERIES, INC.

T. ROWE PRICE NEW AMERICA GROWTH FUND

T. ROWE PRICE SCIENCE & TECHNOLOGY FUND, INC.

T. ROWE PRICE SMALL-CAP STOCK FUND, INC.

T. ROWE PRICE SMALL-CAP VALUE FUND, INC.

JOHN H. LAPORTE, Director and Vice President

T. ROWE PRICE DIVERSIFIED SMALL-CAP GROWTH FUND, INC.

T. ROWE PRICE HEALTH SCIENCES FUND, INC.

T. ROWE PRICE NEW HORIZONS FUND, INC.

/s/John H. Laporte John H. Laporte April 24, 2012

(Signatures Continued)

Page 10

BRIAN C. ROGERS, Director/Trustee

T. ROWE PRICE BALANCED FUND, INC.

T. ROWE PRICE BLUE CHIP GROWTH FUND, INC.

T. ROWE PRICE CAPITAL APPRECIATION FUND

T. ROWE PRICE DIVIDEND GROWTH FUND, INC.

T. ROWE PRICE FINANCIAL SERVICES FUND, INC.

T. ROWE PRICE GLOBAL REAL ESTATE FUND, INC.

T. ROWE PRICE GLOBAL TECHNOLOGY FUND, INC.

T. ROWE PRICE GROWTH & INCOME FUND, INC.

T. ROWE PRICE GROWTH STOCK FUND, INC.

T. ROWE INDEX TRUST, INC.

T. ROWE PRICE INSTITUTIONAL INTERNATIONAL FUNDS, INC.

T. ROWE PRICE INTERNATIONAL FUNDS, INC.

T. ROWE PRICE INTERNATIONAL INDEX FUND, INC.

T. ROWE PRICE INTERNATIONAL SERIES, INC.

T. ROWE PRICE MEDIA & TELECOMMUNICATIONS FUND, INC.

T. ROWE PRICE MID-CAP GROWTH FUND, INC.

T. ROWE PRICE MID-CAP VALUE FUND, INC.

T. ROWE PRICE NEW ERA FUND, INC.

T. ROWE PRICE REAL ASSETS FUND, INC.

T. ROWE PRICE REAL ESTATE FUND, INC.

T. ROWE PRICE TAX-EFFICIENT FUNDS, INC.

T. ROWE PRICE U.S. LARGE-CAP CORE FUND, INC.

BRIAN C. ROGERS, Director/Trustee and President

T. ROWE PRICE EQUITY INCOME FUND

T. ROWE PRICE INSTITUTIONAL EQUITY FUNDS, INC.

BRIAN C. ROGERS, Director/Trustee and Vice President

T. ROWE PRICE PERSONAL STRATEGY FUNDS, INC.

T. ROWE PRICE RETIREMENT FUNDS, INC.

T. ROWE PRICE SPECTRUM FUND, INC.

T. ROWE PRICE VALUE FUND, INC.

/s/Brian C. Rogers Brian C. Rogers April 24, 2012

(Signatures Continued)

Page 11

ATTEST:

/s/Patricia B. Lippert

Patricia B. Lippert, Secretary

XML

Advisor Class Shares | T. Rowe Price Small-Cap Stock Fund, Inc.

Small-Cap Stock Fund–Advisor Class

SUMMARY

Investment Objective

The fund seeks to provide long-term capital growth by investing primarily in stocks of small companies.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the fund.

Fees and Expenses of the Fund's Advisor Class

Annual fund operating expenses

(expenses that you pay each year as a

percentage of the value of your investment)

Annual Fund Operating Expenses	Advisor Class Shares T. Rowe Price Small-Cap Stock Fund, Inc. T. Rowe Price Small-Cap Stock Fund-Advisor Class
Management fees	0.75%
Distribution and service (12b-1) fees	0.25%
Other expenses	0.16%
Total annual fund operating expenses	1.16%

Example

This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods. The example also assumes that your investment has a 5% return each year and that the fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example (USD $)	1 year	3 years	5 years	10 years
Advisor Class Shares T. Rowe Price Small-Cap Stock Fund, Inc. T. Rowe Price Small-Cap Stock Fund-Advisor Class	118	368	638	1,409

Portfolio Turnover

The fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund’s performance. During the most recent fiscal year, the fund’s portfolio turnover rate was 23.7% of the average value of its portfolio.

Investments, Risks, and Performance

Principal Investment Strategies

The fund will normally invest at least 80% of its net assets (including any borrowings for investment purposes) in stocks of small companies. The fund defines a small company as one whose market capitalization falls (i) within or below the current range of companies in either the Russell 2000 Index or the S&P SmallCap 600 Index or (ii) below the three-year average maximum market cap of companies in either index as of December 31 of the three preceding years. The Russell 2000 and S&P SmallCap 600 Indices are widely used benchmarks for tracking small-cap stock performance. As of December 31, 2011, the market capitalization ranges for the Russell 2000 Index and the S&P SmallCap 600 Index were approximately $23 million to $3.7 billion, and $37 million to $3.7 billion, respectively. The market capitalizations of the companies in the fund’s portfolio and the S&P and Russell indexes change over time; the fund will not automatically sell or cease to purchase stock of a company it already owns just because the company’s market capitalization grows or falls outside this range. The fund may, on occasion, purchase companies with a market capitalization above the ranges. When choosing stocks, we generally look for one or more of the following characteristics:

·capable management;

·attractive business niches;

·pricing flexibility;

·sound financial and accounting practices;

·a potential or demonstrated ability to grow revenues, earnings, and cash flow consistently; and

·the potential for a catalyst (such as increased investor attention, asset sales, strong business prospects, or a change in management) to cause the stock’s price to rise.

Holdings will be widely diversified by industry and company; under most circumstances, the fund will invest less than 1.5% of its total assets in any single company. Stock selection may reflect either a growth or value investment approach. For example, we may look for a company whose price/earnings ratio is attractive relative to the underlying earnings growth rate. A value stock would be one where the stock price appears undervalued in relation to earnings, projected cash flow, or asset value per share.

In pursuing its investment objective, the fund has the discretion to deviate from its normal investment criteria, as previously described, and purchase securities that the fund’s management believes will provide an opportunity for substantial appreciation. These situations might arise when the fund’s management believes a security could increase in value for a variety of reasons, including an extraordinary corporate event, a new product introduction or innovation, a favorable competitive development, or a change in management.

While most assets will typically be invested in U.S. common stocks, the fund may invest in foreign stocks in keeping with the fund’s objectives.

The fund may sell securities for a variety of reasons, such as to secure gains, limit losses, or redeploy assets into more promising opportunities.

Principal Risks

As with any mutual fund, there is no guarantee that the fund will achieve its objective. The fund’s share price fluctuates, which means you could lose money by investing in the fund. The principal risks of investing in this fund are summarized as follows:

Active management risk The fund is subject to the risk that the investment adviser’s judgments about the attractiveness, value, or potential appreciation of the fund’s investments may prove to be incorrect. If the securities selected and strategies employed by the fund fail to produce the intended results, the fund could underperform other funds with similar objectives and investment strategies.

Risks of stock investing Stocks generally fluctuate in value more than bonds and may decline significantly over short time periods. There is a chance that stock prices overall will decline because stock markets tend to move in cycles, with periods of rising prices and falling prices. The value of a stock in which the fund invests may decline due to general weakness in the stock market or because of factors that affect a company or a particular industry.

Investment style risk Different investment styles tend to shift in and out of favor, depending on market conditions and investor sentiment. Because the fund holds stocks with both growth and value characteristics, it could underperform other stock funds that take a strictly growth or value approach to investing when one style is currently in favor. Growth stocks tend to be more volatile than the overall stock market and can have sharp price declines as a result of earnings disappointments. Value stocks carry the risk that the market will not recognize their intrinsic value or that they are actually appropriately priced at a low level.

Market capitalization risk Investing primarily in issuers within the same market capitalization category carries the risk that the category may be out of favor due to current market conditions or investor sentiment. Because the fund invests primarily in securities issued by small-cap companies, it is likely to be more volatile than a fund that focuses on securities issued by larger companies. Small-sized companies often have less experienced management, narrower product lines, more limited financial resources, and less publicly available information than larger companies. In addition, smaller companies are typically more sensitive to changes in overall economic conditions and their securities may be difficult to trade.

Foreign investing risk This is the risk that the fund’s investments in foreign securities may be adversely affected by political and economic conditions overseas, reduced liquidity, or decreases in foreign currency values relative to the U.S. dollar.

Performance

The bar chart showing calendar year returns and the average annual total returns table indicate risk by illustrating how much returns can differ from one year to the next and how fund performance compares with that of a comparable market index. The fund’s past performance (before and after taxes) is not necessarily an indication of future performance.

The fund can also experience short-term performance swings, as shown by the best and worst calendar quarter returns during the years depicted.

Small-Cap Stock Fund–Advisor Class

Calendar Year Returns

	Quarter	Total
	Ended	Return
Best Quarter	6/30/09	21.05%
Worst Quarter	12/31/08	-23.88%

In addition, the average annual total returns table shows hypothetical after-tax returns to suggest how taxes paid by a shareholder may influence returns. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) account or individual retirement account.

Average Annual Total Returns

Periods ended

December 31, 2011

Average Annual Total Returns Advisor Class Shares T. Rowe Price Small-Cap Stock Fund, Inc.	1 Year	5 Years	10 Years
T. Rowe Price Small-Cap Stock Fund-Advisor Class	(0.34%)	3.49%	6.83%
T. Rowe Price Small-Cap Stock Fund-Advisor Class Returns after taxes on distributions	(1.68%)	2.69%	6.10%
T. Rowe Price Small-Cap Stock Fund-Advisor Class Returns after taxes on distributions and sale of fund shares	1.44%	2.89%	5.87%
Russell 2000 Index	(4.18%)	0.15%	5.62%
S&P SmallCap 600 Index	1.02%	1.94%	7.09%
Lipper Small-Cap Core Funds Index	(3.81%)	1.32%	5.81%

Updated performance information is available through troweprice.com or may be obtained by calling 1-800-638-8790.

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Investor Class Shares | T. Rowe Price Small-Cap Stock Fund, Inc.

Small-Cap Stock Fund

SUMMARY

Investment Objective

The fund seeks to provide long-term capital growth by investing primarily in stocks of small companies.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the fund.

Fees and Expenses of the Fund

Shareholder fees (fees paid directly from your investment)

Shareholder Fees (USD $)		Investor Class Shares T. Rowe Price Small-Cap Stock Fund, Inc.
Maximum sales charge (load) imposed on purchases		none
Maximum deferred sales charge (load)		none
Redemption fee		none
Maximum account fee	[1]	20

Annual fund operating expenses

(expenses that you pay each year as a

percentage of the value of your investment)

Annual Fund Operating Expenses	Investor Class Shares T. Rowe Price Small-Cap Stock Fund, Inc.
Management fees	0.75%
Distribution and service (12b-1) fees	none
Other expenses	0.17%
Total annual fund operating expenses	0.92%

Example

This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods. The example also assumes that your investment has a 5% return each year and that the fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example (USD $)	1 year	3 years	5 years	10 years
Investor Class Shares T. Rowe Price Small-Cap Stock Fund, Inc.	94	293	509	1,131

Portfolio Turnover

The fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund’s performance. During the most recent fiscal year, the fund’s portfolio turnover rate was 23.7% of the average value of its portfolio.

Investments, Risks, and Performance

Principal Investment Strategies

The fund will normally invest at least 80% of its net assets (including any borrowings for investment purposes) in stocks of small companies. The fund defines a small company as one whose market capitalization falls (i) within or below the current range of companies in either the Russell 2000 Index or the S&P SmallCap 600 Index or (ii) below the three-year average maximum market cap of companies in either index as of December 31 of the three preceding years. The Russell 2000 and S&P SmallCap 600 Indices are widely used benchmarks for tracking small-cap stock performance. As of December 31, 2011, the market capitalization ranges for the Russell 2000 Index and the S&P SmallCap 600 Index were approximately $23 million to $3.7 billion, and $37 million to $3.7 billion, respectively. The market capitalizations of the companies in the fund’s portfolio and the S&P and Russell indexes change over time; the fund will not automatically sell or cease to purchase stock of a company it already owns just because the company’s market capitalization grows or falls outside this range. The fund may, on occasion, purchase companies with a market capitalization above the ranges. When choosing stocks, we generally look for one or more of the following characteristics:

·capable management;

·attractive business niches;

·pricing flexibility;

·sound financial and accounting practices;

·a potential or demonstrated ability to grow revenues, earnings, and cash flow consistently; and

·the potential for a catalyst (such as increased investor attention, asset sales, strong business prospects, or a change in management) to cause the stock’s price to rise.

Holdings will be widely diversified by industry and company; under most circumstances, the fund will invest less than 1.5% of its total assets in any single company. Stock selection may reflect either a growth or value investment approach. For example, we may look for a company whose price/earnings ratio is attractive relative to the underlying earnings growth rate. A value stock would be one where the stock price appears undervalued in relation to earnings, projected cash flow, or asset value per share.

In pursuing its investment objective, the fund has the discretion to deviate from its normal investment criteria, as previously described, and purchase securities that the fund’s management believes will provide an opportunity for substantial appreciation. These situations might arise when the fund’s management believes a security could increase in value for a variety of reasons, including an extraordinary corporate event, a new product introduction or innovation, a favorable competitive development, or a change in management.

While most assets will typically be invested in U.S. common stocks, the fund may invest in foreign stocks in keeping with the fund’s objectives.

The fund may sell securities for a variety of reasons, such as to secure gains, limit losses, or redeploy assets into more promising opportunities.

Principal Risks

As with any mutual fund, there is no guarantee that the fund will achieve its objective. The fund’s share price fluctuates, which means you could lose money by investing in the fund. The principal risks of investing in this fund are summarized as follows:

Active management risk The fund is subject to the risk that the investment adviser’s judgments about the attractiveness, value, or potential appreciation of the fund’s investments may prove to be incorrect. If the securities selected and strategies employed by the fund fail to produce the intended results, the fund could underperform other funds with similar objectives and investment strategies.

Risks of stock investing Stocks generally fluctuate in value more than bonds and may decline significantly over short time periods. There is a chance that stock prices overall will decline because stock markets tend to move in cycles, with periods of rising prices and falling prices. The value of a stock in which the fund invests may decline due to general weakness in the stock market or because of factors that affect a company or a particular industry.

Investment style risk Different investment styles tend to shift in and out of favor, depending on market conditions and investor sentiment. Because the fund holds stocks with both growth and value characteristics, it could underperform other stock funds that take a strictly growth or value approach to investing when one style is currently in favor. Growth stocks tend to be more volatile than the overall stock market and can have sharp price declines as a result of earnings disappointments. Value stocks carry the risk that the market will not recognize their intrinsic value or that they are actually appropriately priced at a low level.

Market capitalization risk Investing primarily in issuers within the same market capitalization category carries the risk that the category may be out of favor due to current market conditions or investor sentiment. Because the fund invests primarily in securities issued by small-cap companies, it is likely to be more volatile than a fund that focuses on securities issued by larger companies. Small-sized companies often have less experienced management, narrower product lines, more limited financial resources, and less publicly available information than larger companies. In addition, smaller companies are typically more sensitive to changes in overall economic conditions and their securities may be difficult to trade.

Foreign investing risk This is the risk that the fund’s investments in foreign securities may be adversely affected by political and economic conditions overseas, reduced liquidity, or decreases in foreign currency values relative to the U.S. dollar.

Performance

The bar chart showing calendar year returns and the average annual total returns table indicate risk by illustrating how much returns can differ from one year to the next and how fund performance compares with that of a comparable market index. The fund’s past performance (before and after taxes) is not necessarily an indication of future performance.

The fund can also experience short-term performance swings, as shown by the best and worst calendar quarter returns during the years depicted.

Small-Cap Stock Fund

Calendar Year Returns

	Quarter	Total
	Ended	Return
Best Quarter	6/30/09	21.12%
Worst Quarter	12/31/08	-23.83%

In addition, the average annual total returns table shows hypothetical after-tax returns to suggest how taxes paid by a shareholder may influence returns. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) account or individual retirement account.

Average Annual Total Returns

Periods ended

December 31, 2011

Average Annual Total Returns Investor Class Shares	1 Year	5 Years	10 Years
T. Rowe Price Small-Cap Stock Fund, Inc.	(0.09%)	3.72%	7.07%
T. Rowe Price Small-Cap Stock Fund, Inc. Returns after taxes on distributions	(1.46%)	2.89%	6.30%
T. Rowe Price Small-Cap Stock Fund, Inc. Returns after taxes on distributions and sale of fund shares	1.65%	3.08%	6.07%
T. Rowe Price Small-Cap Stock Fund, Inc. Russell 2000 Index	(4.18%)	0.15%	5.62%
T. Rowe Price Small-Cap Stock Fund, Inc. S&P SmallCap 600 Index	1.02%	1.94%	7.09%
T. Rowe Price Small-Cap Stock Fund, Inc. Lipper Small-Cap Core Funds Index	(3.81%)	1.32%	5.81%

Updated performance information is available through troweprice.com or may be obtained by calling 1-800-225-5132.

[1] Subject to certain exceptions, accounts with a balance of less than $10,000 are charged an annual $20 fee.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Document Type

dei_DocumentType

485BPOS

Document Period End Date

dei_DocumentPeriodEndDate

Dec. 31, 2011

Registrant Name

dei_EntityRegistrantName

T. Rowe Price Small-Cap Stock Fund, Inc.

Central Index Key

dei_EntityCentralIndexKey

0000075170

Amendment Flag

dei_AmendmentFlag

false

Document Creation Date

dei_DocumentCreationDate

Apr. 26, 2012

Document Effective Date

dei_DocumentEffectiveDate

May 01, 2012

Prospectus Date

rr_ProspectusDate

May 01, 2012

Investor Class Shares | T. Rowe Price Small-Cap Stock Fund, Inc.

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Small-Cap Stock Fund

SUMMARY

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund seeks to provide long-term capital growth by investing primarily in stocks of small companies.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy and hold shares of the fund.

Shareholder Fees:

rr_ShareholderFeesAbstract

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Fees and Expenses of the Fund

Shareholder fees (fees paid directly from your investment)

Operating Expenses:

rr_OperatingExpensesAbstract

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual fund operating expenses

(expenses that you pay each year as a

percentage of the value of your investment)

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio Turnover

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund’s performance. During the most recent fiscal year, the fund’s portfolio turnover rate was 23.7% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

23.70%

Expense Example:

rr_ExpenseExampleAbstract

Expense Example [Heading]

rr_ExpenseExampleHeading

Example

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods. The example also assumes that your investment has a 5% return each year and that the fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

rr_StrategyHeading

Investments, Risks, and Performance

Principal Investment Strategies

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The fund will normally invest at least 80% of its net assets (including any borrowings for investment purposes) in stocks of small companies. The fund defines a small company as one whose market capitalization falls (i) within or below the current range of companies in either the Russell 2000 Index or the S&P SmallCap 600 Index or (ii) below the three-year average maximum market cap of companies in either index as of December 31 of the three preceding years. The Russell 2000 and S&P SmallCap 600 Indices are widely used benchmarks for tracking small-cap stock performance. As of December 31, 2011, the market capitalization ranges for the Russell 2000 Index and the S&P SmallCap 600 Index were approximately $23 million to $3.7 billion, and $37 million to $3.7 billion, respectively. The market capitalizations of the companies in the fund’s portfolio and the S&P and Russell indexes change over time; the fund will not automatically sell or cease to purchase stock of a company it already owns just because the company’s market capitalization grows or falls outside this range. The fund may, on occasion, purchase companies with a market capitalization above the ranges. When choosing stocks, we generally look for one or more of the following characteristics:

·capable management;

·attractive business niches;

·pricing flexibility;

·sound financial and accounting practices;

·a potential or demonstrated ability to grow revenues, earnings, and cash flow consistently; and

·the potential for a catalyst (such as increased investor attention, asset sales, strong business prospects, or a change in management) to cause the stock’s price to rise.

Holdings will be widely diversified by industry and company; under most circumstances, the fund will invest less than 1.5% of its total assets in any single company. Stock selection may reflect either a growth or value investment approach. For example, we may look for a company whose price/earnings ratio is attractive relative to the underlying earnings growth rate. A value stock would be one where the stock price appears undervalued in relation to earnings, projected cash flow, or asset value per share.

In pursuing its investment objective, the fund has the discretion to deviate from its normal investment criteria, as previously described, and purchase securities that the fund’s management believes will provide an opportunity for substantial appreciation. These situations might arise when the fund’s management believes a security could increase in value for a variety of reasons, including an extraordinary corporate event, a new product introduction or innovation, a favorable competitive development, or a change in management.

While most assets will typically be invested in U.S. common stocks, the fund may invest in foreign stocks in keeping with the fund’s objectives.

The fund may sell securities for a variety of reasons, such as to secure gains, limit losses, or redeploy assets into more promising opportunities.

Risk [Heading]

rr_RiskHeading

Principal Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

As with any mutual fund, there is no guarantee that the fund will achieve its objective. The fund’s share price fluctuates, which means you could lose money by investing in the fund. The principal risks of investing in this fund are summarized as follows:

Active management risk The fund is subject to the risk that the investment adviser’s judgments about the attractiveness, value, or potential appreciation of the fund’s investments may prove to be incorrect. If the securities selected and strategies employed by the fund fail to produce the intended results, the fund could underperform other funds with similar objectives and investment strategies.

Risks of stock investing Stocks generally fluctuate in value more than bonds and may decline significantly over short time periods. There is a chance that stock prices overall will decline because stock markets tend to move in cycles, with periods of rising prices and falling prices. The value of a stock in which the fund invests may decline due to general weakness in the stock market or because of factors that affect a company or a particular industry.

Investment style risk Different investment styles tend to shift in and out of favor, depending on market conditions and investor sentiment. Because the fund holds stocks with both growth and value characteristics, it could underperform other stock funds that take a strictly growth or value approach to investing when one style is currently in favor. Growth stocks tend to be more volatile than the overall stock market and can have sharp price declines as a result of earnings disappointments. Value stocks carry the risk that the market will not recognize their intrinsic value or that they are actually appropriately priced at a low level.

Market capitalization risk Investing primarily in issuers within the same market capitalization category carries the risk that the category may be out of favor due to current market conditions or investor sentiment. Because the fund invests primarily in securities issued by small-cap companies, it is likely to be more volatile than a fund that focuses on securities issued by larger companies. Small-sized companies often have less experienced management, narrower product lines, more limited financial resources, and less publicly available information than larger companies. In addition, smaller companies are typically more sensitive to changes in overall economic conditions and their securities may be difficult to trade.

Foreign investing risk This is the risk that the fund’s investments in foreign securities may be adversely affected by political and economic conditions overseas, reduced liquidity, or decreases in foreign currency values relative to the U.S. dollar.

Risk Lose Money [Text]

rr_RiskLoseMoney

The fund’s share price fluctuates, which means you could lose money by investing in the fund.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The bar chart showing calendar year returns and the average annual total returns table indicate risk by illustrating how much returns can differ from one year to the next and how fund performance compares with that of a comparable market index. The fund’s past performance (before and after taxes) is not necessarily an indication of future performance.

The fund can also experience short-term performance swings, as shown by the best and worst calendar quarter returns during the years depicted.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The bar chart showing calendar year returns and the average annual total returns table indicate risk by illustrating how much returns can differ from one year to the next and how fund performance compares with that of a comparable market index.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

1-800-225-5132

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

troweprice.com

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

The fund’s past performance (before and after taxes) is not necessarily an indication of future performance.

Bar Chart Table:

rr_BarChartTableAbstract

Bar Chart [Heading]

rr_BarChartHeading

Small-Cap Stock Fund

Calendar Year Returns

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

	Quarter	Total
	Ended	Return
Best Quarter	6/30/09	21.12%
Worst Quarter	12/31/08	-23.83%

Average Annual Return:

rr_AverageAnnualReturnAbstract

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns

Periods ended

December 31, 2011

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) account or individual retirement account.

Performance Table Narrative

rr_PerformanceTableNarrativeTextBlock

In addition, the average annual total returns table shows hypothetical after-tax returns to suggest how taxes paid by a shareholder may influence returns. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) account or individual retirement account.

Performance Table Closing [Text Block]

rr_PerformanceTableClosingTextBlock

Updated performance information is available through troweprice.com or may be obtained by calling 1-800-225-5132.

Investor Class Shares | T. Rowe Price Small-Cap Stock Fund, Inc. | T. Rowe Price Small-Cap Stock Fund, Inc.

Shareholder Fees:

rr_ShareholderFeesAbstract

Maximum sales charge (load) imposed on purchases

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum deferred sales charge (load)

rr_MaximumDeferredSalesChargeOverOfferingPrice

none

Redemption fee

rr_RedemptionFee

none

Maximum account fee

rr_MaximumAccountFee

20

^[1]

Operating Expenses:

rr_OperatingExpensesAbstract

Management fees

rr_ManagementFeesOverAssets

0.75%

Distribution and service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses

rr_OtherExpensesOverAssets

0.17%

Total annual fund operating expenses

rr_ExpensesOverAssets

0.92%

Expense Example:

rr_ExpenseExampleAbstract

1 year

rr_ExpenseExampleYear01

94

3 years

rr_ExpenseExampleYear03

293

5 years

rr_ExpenseExampleYear05

509

10 years

rr_ExpenseExampleYear10

1,131

Bar Chart Table:

rr_BarChartTableAbstract

'02

rr_AnnualReturn2002

(14.21%)

'03

rr_AnnualReturn2003

32.35%

'04

rr_AnnualReturn2004

18.77%

'05

rr_AnnualReturn2005

8.44%

'06

rr_AnnualReturn2006

12.78%

'07

rr_AnnualReturn2007

(1.75%)

'08

rr_AnnualReturn2008

(33.35%)

'09

rr_AnnualReturn2009

38.46%

'10

rr_AnnualReturn2010

32.53%

'11

rr_AnnualReturn2011

(0.09%)

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

21.12%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(23.83%)

Average Annual Return:

rr_AverageAnnualReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

(0.09%)

5 Years

rr_AverageAnnualReturnYear05

3.72%

10 Years

rr_AverageAnnualReturnYear10

7.07%

Investor Class Shares | T. Rowe Price Small-Cap Stock Fund, Inc. | Returns after taxes on distributions | T. Rowe Price Small-Cap Stock Fund, Inc.

Average Annual Return:

rr_AverageAnnualReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

(1.46%)

5 Years

rr_AverageAnnualReturnYear05

2.89%

10 Years

rr_AverageAnnualReturnYear10

6.30%

Investor Class Shares | T. Rowe Price Small-Cap Stock Fund, Inc. | Returns after taxes on distributions and sale of fund shares | T. Rowe Price Small-Cap Stock Fund, Inc.

Average Annual Return:

rr_AverageAnnualReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

1.65%

5 Years

rr_AverageAnnualReturnYear05

3.08%

10 Years

rr_AverageAnnualReturnYear10

6.07%

Investor Class Shares | T. Rowe Price Small-Cap Stock Fund, Inc. | Russell 2000 Index

Average Annual Return:

rr_AverageAnnualReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

(4.18%)

5 Years

rr_AverageAnnualReturnYear05

0.15%

10 Years

rr_AverageAnnualReturnYear10

5.62%

Investor Class Shares | T. Rowe Price Small-Cap Stock Fund, Inc. | S&P SmallCap 600 Index

Average Annual Return:

rr_AverageAnnualReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

1.02%

5 Years

rr_AverageAnnualReturnYear05

1.94%

10 Years

rr_AverageAnnualReturnYear10

7.09%

Investor Class Shares | T. Rowe Price Small-Cap Stock Fund, Inc. | Lipper Small-Cap Core Funds Index

Average Annual Return:

rr_AverageAnnualReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

(3.81%)

5 Years

rr_AverageAnnualReturnYear05

1.32%

10 Years

rr_AverageAnnualReturnYear10

5.81%

Advisor Class Shares | T. Rowe Price Small-Cap Stock Fund, Inc.

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Small-Cap Stock Fund–Advisor Class

SUMMARY

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund seeks to provide long-term capital growth by investing primarily in stocks of small companies.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy and hold shares of the fund.

Operating Expenses:

rr_OperatingExpensesAbstract

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Fees and Expenses of the Fund's Advisor Class

Annual fund operating expenses

(expenses that you pay each year as a

percentage of the value of your investment)

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio Turnover

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund’s performance. During the most recent fiscal year, the fund’s portfolio turnover rate was 23.7% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

23.70%

Expense Example:

rr_ExpenseExampleAbstract

Expense Example [Heading]

rr_ExpenseExampleHeading

Example

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods. The example also assumes that your investment has a 5% return each year and that the fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

rr_StrategyHeading

Investments, Risks, and Performance

Principal Investment Strategies

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The fund will normally invest at least 80% of its net assets (including any borrowings for investment purposes) in stocks of small companies. The fund defines a small company as one whose market capitalization falls (i) within or below the current range of companies in either the Russell 2000 Index or the S&P SmallCap 600 Index or (ii) below the three-year average maximum market cap of companies in either index as of December 31 of the three preceding years. The Russell 2000 and S&P SmallCap 600 Indices are widely used benchmarks for tracking small-cap stock performance. As of December 31, 2011, the market capitalization ranges for the Russell 2000 Index and the S&P SmallCap 600 Index were approximately $23 million to $3.7 billion, and $37 million to $3.7 billion, respectively. The market capitalizations of the companies in the fund’s portfolio and the S&P and Russell indexes change over time; the fund will not automatically sell or cease to purchase stock of a company it already owns just because the company’s market capitalization grows or falls outside this range. The fund may, on occasion, purchase companies with a market capitalization above the ranges. When choosing stocks, we generally look for one or more of the following characteristics:

·capable management;

·attractive business niches;

·pricing flexibility;

·sound financial and accounting practices;

·a potential or demonstrated ability to grow revenues, earnings, and cash flow consistently; and

·the potential for a catalyst (such as increased investor attention, asset sales, strong business prospects, or a change in management) to cause the stock’s price to rise.

Holdings will be widely diversified by industry and company; under most circumstances, the fund will invest less than 1.5% of its total assets in any single company. Stock selection may reflect either a growth or value investment approach. For example, we may look for a company whose price/earnings ratio is attractive relative to the underlying earnings growth rate. A value stock would be one where the stock price appears undervalued in relation to earnings, projected cash flow, or asset value per share.

In pursuing its investment objective, the fund has the discretion to deviate from its normal investment criteria, as previously described, and purchase securities that the fund’s management believes will provide an opportunity for substantial appreciation. These situations might arise when the fund’s management believes a security could increase in value for a variety of reasons, including an extraordinary corporate event, a new product introduction or innovation, a favorable competitive development, or a change in management.

While most assets will typically be invested in U.S. common stocks, the fund may invest in foreign stocks in keeping with the fund’s objectives.

The fund may sell securities for a variety of reasons, such as to secure gains, limit losses, or redeploy assets into more promising opportunities.

Risk [Heading]

rr_RiskHeading

Principal Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

As with any mutual fund, there is no guarantee that the fund will achieve its objective. The fund’s share price fluctuates, which means you could lose money by investing in the fund. The principal risks of investing in this fund are summarized as follows:

Active management risk The fund is subject to the risk that the investment adviser’s judgments about the attractiveness, value, or potential appreciation of the fund’s investments may prove to be incorrect. If the securities selected and strategies employed by the fund fail to produce the intended results, the fund could underperform other funds with similar objectives and investment strategies.

Risks of stock investing Stocks generally fluctuate in value more than bonds and may decline significantly over short time periods. There is a chance that stock prices overall will decline because stock markets tend to move in cycles, with periods of rising prices and falling prices. The value of a stock in which the fund invests may decline due to general weakness in the stock market or because of factors that affect a company or a particular industry.

Investment style risk Different investment styles tend to shift in and out of favor, depending on market conditions and investor sentiment. Because the fund holds stocks with both growth and value characteristics, it could underperform other stock funds that take a strictly growth or value approach to investing when one style is currently in favor. Growth stocks tend to be more volatile than the overall stock market and can have sharp price declines as a result of earnings disappointments. Value stocks carry the risk that the market will not recognize their intrinsic value or that they are actually appropriately priced at a low level.

Market capitalization risk Investing primarily in issuers within the same market capitalization category carries the risk that the category may be out of favor due to current market conditions or investor sentiment. Because the fund invests primarily in securities issued by small-cap companies, it is likely to be more volatile than a fund that focuses on securities issued by larger companies. Small-sized companies often have less experienced management, narrower product lines, more limited financial resources, and less publicly available information than larger companies. In addition, smaller companies are typically more sensitive to changes in overall economic conditions and their securities may be difficult to trade.

Foreign investing risk This is the risk that the fund’s investments in foreign securities may be adversely affected by political and economic conditions overseas, reduced liquidity, or decreases in foreign currency values relative to the U.S. dollar.

Risk Lose Money [Text]

rr_RiskLoseMoney

The fund’s share price fluctuates, which means you could lose money by investing in the fund.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The bar chart showing calendar year returns and the average annual total returns table indicate risk by illustrating how much returns can differ from one year to the next and how fund performance compares with that of a comparable market index. The fund’s past performance (before and after taxes) is not necessarily an indication of future performance.

The fund can also experience short-term performance swings, as shown by the best and worst calendar quarter returns during the years depicted.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The bar chart showing calendar year returns and the average annual total returns table indicate risk by illustrating how much returns can differ from one year to the next and how fund performance compares with that of a comparable market index.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

1-800-638-8790

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

troweprice.com

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

The fund’s past performance (before and after taxes) is not necessarily an indication of future performance.

Bar Chart Table:

rr_BarChartTableAbstract

Bar Chart [Heading]

rr_BarChartHeading

Small-Cap Stock Fund–Advisor Class

Calendar Year Returns

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

	Quarter	Total
	Ended	Return
Best Quarter	6/30/09	21.05%
Worst Quarter	12/31/08	-23.88%

Average Annual Return:

rr_AverageAnnualReturnAbstract

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns

Periods ended

December 31, 2011

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) account or individual retirement account.

Performance Table Narrative

rr_PerformanceTableNarrativeTextBlock

In addition, the average annual total returns table shows hypothetical after-tax returns to suggest how taxes paid by a shareholder may influence returns. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as a 401(k) account or individual retirement account.

Performance Table Closing [Text Block]

rr_PerformanceTableClosingTextBlock

Updated performance information is available through troweprice.com or may be obtained by calling 1-800-638-8790.

Advisor Class Shares | T. Rowe Price Small-Cap Stock Fund, Inc. | T. Rowe Price Small-Cap Stock Fund-Advisor Class

Operating Expenses:

rr_OperatingExpensesAbstract

Management fees

rr_ManagementFeesOverAssets

0.75%

Distribution and service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other expenses

rr_OtherExpensesOverAssets

0.16%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.16%

Expense Example:

rr_ExpenseExampleAbstract

1 year

rr_ExpenseExampleYear01

118

3 years

rr_ExpenseExampleYear03

368

5 years

rr_ExpenseExampleYear05

638

10 years

rr_ExpenseExampleYear10

1,409

Bar Chart Table:

rr_BarChartTableAbstract

'02

rr_AnnualReturn2002

(14.41%)

'03

rr_AnnualReturn2003

32.06%

'04

rr_AnnualReturn2004

18.48%

'05

rr_AnnualReturn2005

8.23%

'06

rr_AnnualReturn2006

12.52%

'07

rr_AnnualReturn2007

(1.96%)

'08

rr_AnnualReturn2008

(33.50%)

'09

rr_AnnualReturn2009

38.16%

'10

rr_AnnualReturn2010

32.25%

'11

rr_AnnualReturn2011

(0.34%)

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

21.05%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(23.88%)

Average Annual Return:

rr_AverageAnnualReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

(0.34%)

5 Years

rr_AverageAnnualReturnYear05

3.49%

10 Years

rr_AverageAnnualReturnYear10

6.83%

Advisor Class Shares | T. Rowe Price Small-Cap Stock Fund, Inc. | Returns after taxes on distributions | T. Rowe Price Small-Cap Stock Fund-Advisor Class

Average Annual Return:

rr_AverageAnnualReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

(1.68%)

5 Years

rr_AverageAnnualReturnYear05

2.69%

10 Years

rr_AverageAnnualReturnYear10

6.10%

Advisor Class Shares | T. Rowe Price Small-Cap Stock Fund, Inc. | Returns after taxes on distributions and sale of fund shares | T. Rowe Price Small-Cap Stock Fund-Advisor Class

Average Annual Return:

rr_AverageAnnualReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

1.44%

5 Years

rr_AverageAnnualReturnYear05

2.89%

10 Years

rr_AverageAnnualReturnYear10

5.87%

Advisor Class Shares | T. Rowe Price Small-Cap Stock Fund, Inc. | Russell 2000 Index

Average Annual Return:

rr_AverageAnnualReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

(4.18%)

5 Years

rr_AverageAnnualReturnYear05

0.15%

10 Years

rr_AverageAnnualReturnYear10

5.62%

Advisor Class Shares | T. Rowe Price Small-Cap Stock Fund, Inc. | S&P SmallCap 600 Index

Average Annual Return:

rr_AverageAnnualReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

1.02%

5 Years

rr_AverageAnnualReturnYear05

1.94%

10 Years

rr_AverageAnnualReturnYear10

7.09%

Advisor Class Shares | T. Rowe Price Small-Cap Stock Fund, Inc. | Lipper Small-Cap Core Funds Index

Average Annual Return:

rr_AverageAnnualReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

(3.81%)

5 Years

rr_AverageAnnualReturnYear05

1.32%

10 Years

rr_AverageAnnualReturnYear10

5.81%

[1] Subject to certain exceptions, accounts with a balance of less than $10,000 are charged an annual $20 fee.