485BPOS

Registration Nos. 033-29697/811-5833

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. 67 /X/

and/or

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

Amendment No. 63 /X/

T. ROWE PRICE INSTITUTIONAL INTERNATIONAL FUNDS, 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 August 28, 2014.

T. ROWE PRICE INSTITUTIONAL INTERNATIONAL FUNDS, 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	August 28, 2014
Edward C. Bernard	(Chief Executive Officer)
/s/Gregory K. Hinkle	Treasurer (Chief	August 28, 2014
Gregory K. Hinkle	Financial Officer)
*	Director	August 28, 2014
William R. Brody
*	Director	August 28, 2014
Anthony W. Deering
*	Director	August 28, 2014
Donald W. Dick, Jr.
*	Director	August 28, 2014
Bruce W. Duncan
*	Director	August 28, 2014
Robert J. Gerrard, Jr.
*	Director	August 28, 2014
Karen N. Horn
*	Director	August 28, 2014
Paul F. McBride
/s/Brian C. Rogers	Director	August 28, 2014
Brian C. Rogers

Page 4

*	Director	August 28, 2014
Cecilia E. Rouse
*	Director	August 28, 2014
John G. Schreiber
*	Director	August 28, 2014
Mark. R. Tercek
*/s/David Oestreicher	Vice President and	August 28, 2014
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 CREDIT OPPORTUNITIES 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 ALLOCATION 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.

Page 6

T. ROWE PRICE SPECTRUM 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-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 /s/Gregory K. Hinkle	Chairman of the Board (Principal Executive Officer) Director/Trustee	April 29, 2014
Gregory K. Hinkle /s/William R. Brody	Treasurer (Principal Financial Officer)	April 29, 2014
William R. Brody /s/Anthony W. Deering	Director/Trustee	April 29, 2014
Anthony W. Deering /s/Donald W. Dick, Jr.	Director/Trustee	April 29, 2014
Donald W. Dick, Jr. /s/Bruce W. Duncan	Director/Trustee	April 29, 2014
Bruce W. Duncan /s/Robert J. Gerrard, Jr.	Director/Trustee	April 29, 2014
Robert J. Gerrard, Jr. /s/Karen N. Horn	Director/Trustee	April 29, 2014
Karen N. Horn	Director/Trustee	April 29, 2014

(Signatures Continued)

Page 8

ALL CORPORATIONS/TRUSTS /s/Paul F. McBride
Paul F. McBride /s/Cecilia E. Rouse	Director/Trustee	April 29, 2014
Cecilia E. Rouse /s/John G. Schreiber	Director/Trustee	April 29, 2014
John G. Schreiber /s/Mark R. Tercek	Director/Trustee	April 29, 2014
Mark R. Tercek	Director/Trustee	April 29, 2014

(Signatures Continued)

Page 9

MICHAEL C. GITLIN, Director/Trustee

T. ROWE PRICE CALIFORNIA TAX-FREE INCOME TRUST

T. ROWE PRICE CORPORATE INCOME FUND, INC.

T. ROWE PRICE CREDIT OPPORTUNITIES FUND, INC.

T. ROWE PRICE FIXED INCOME SERIES, INC.

T. ROWE PRICE FLOATING RATE FUND, INC.

T. ROWE PRICE GNMA FUND

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 MULTI-SECTOR ACCOUNT PORTFOLIOS, 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.

/s/Michael C. Gitlin

Michael C. Gitlin April 29, 2014

(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 CAPITAL OPPORTUNITY 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 GLOBAL ALLOCATION 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 PRICE HEALTH SCIENCES FUND, INC.

T. ROWE INDEX TRUST, INC.

T. ROWE PRICE INSTITUTIONAL EQUITY 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 NEW AMERICA GROWTH FUND

T. ROWE PRICE NEW ERA FUND, INC.

T. ROWE PRICE NEW HORIZONS FUND, INC.

T. ROWE PRICE PERSONAL STRATEGY FUNDS, INC.

T. ROWE PRICE REAL ASSETS FUND, INC.

T. ROWE PRICE REAL ESTATE FUND, INC.

T. ROWE PRICE RETIREMENT FUNDS, INC.

T. ROWE PRICE SCIENCE & TECHNOLOGY 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 TAX-EFFICIENT FUNDS, INC.

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

T. ROWE PRICE VALUE FUND, INC.

/s/Brian C. Rogers

Brian C. Rogers April 29, 2014

(Signatures Continued)

Page 11

ATTEST:

/s/Patricia B. Lippert

Patricia B. Lippert, Secretary

XML

T. Rowe Price Institutional Frontier Markets Equity Fund

T. Rowe Price

Institutional Frontier Markets Equity Fund

SUMMARY

Investment Objective

The fund seeks long-term growth of capital.

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	T. Rowe Price Institutional Frontier Markets Equity Fund
Redemption fee (as a percentage of amount redeemed on shares held for 90 days or less)	2.00%

Annual fund operating expenses
(expenses that you pay each year as a
percentage of the value of your investment)

Annual Fund Operating Expenses		T. Rowe Price Institutional Frontier Markets Equity Fund
Management fees		1.10%
Other expenses	[1]	0.34%
Total annual fund operating expenses		1.44%
Fee waiver/expense reimbursement	[2]	(0.09%)
Total annual fund operating expenses after fee waiver/expense reimbursement	[2]	1.35%

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, the fund’s operating expenses remain the same, and the expense limitation currently in place is not renewed. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example (USD $)	1 year	3 years
T. Rowe Price Institutional Frontier Markets Equity Fund	137	432

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.

Investments, Risks, and Performance

Principal Investment Strategies

The fund normally invests at least 80% of its net assets (including any borrowings for investment purposes) in equity securities and equity-related investments of companies that are located in, or that have economic ties to, countries considered to be frontier markets. The fund may purchase securities issued by companies of any size, but typically seeks larger companies. The fund expects to make most of its investments in companies in frontier markets in Africa, the Middle East, Asia, Europe, and Latin America.

Frontier markets are those markets which are not as developed as emerging markets. The fund considers a country to be a frontier market if it is not included in the MSCI All Country World Index, which contains all of the countries that MSCI has classified as either a developed market or emerging market. The countries that are considered frontier markets may change over time based on how they are classified by MSCI, or another unaffiliated data provider. The fund expects to seek investments in the frontier markets listed below (other countries may be added or removed):

• Africa and Middle East: Bahrain, Botswana, Ghana, Jordan, Kenya, Kuwait, Lebanon, Mauritius, Morocco, Namibia, Nigeria, Oman, Saudi Arabia, Tanzania, Tunisia, Uganda, Zambia and Zimbabwe.

• Asia: Bangladesh, Cambodia, Pakistan, Sri Lanka, and Vietnam.

• Europe: Bosnia, Bulgaria, Croatia, Estonia, Georgia, Kazakhstan, Lithuania, Romania, Serbia, Slovenia, and Ukraine.

• Latin America: Argentina, Jamaica, Panama, and Trinidad & Tobago.

The fund is “nondiversified,” meaning it may invest a greater portion of assets in a single company and own more of the company’s voting securities than is permissible for a “diversified” fund. Most of the fund’s assets will be invested directly in common stocks. The fund may also gain exposure to common stocks by purchasing participation notes (“P-notes”) that offer a return linked to a particular common stock. P-notes are primarily used to invest indirectly in certain stocks that trade in a market that restricts foreign investors, such as the fund, from investing directly in that market.

While the fund invests with an awareness of the global economic backdrop and the outlook for industry sectors and individual countries, bottom-up stock selection is the focus of our decision-making. Country allocation is driven largely by stock selection, though we may limit investments in markets or industries that appear to have poor overall prospects. The fund expects to concentrate its investments (i.e., invest more than 25% of its total assets) in securities issued by banks and other financial services companies.

The fund relies on a global team of investment analysts dedicated to in-depth fundamental research in an effort to identify quality companies with strong cash flows and sustainable growth potential, and does not emphasize either a growth or value bias when identifying potential investments. We generally select securities that in our view have the most favorable combination of company fundamentals, earnings potential, and relative valuation.

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.

P-note risks To the extent the fund invests in P-notes, it is subject to certain risks in addition to the risks normally associated with a direct investment in the underlying foreign securities the P-note seeks to replicate. As the purchaser of a P-note, the fund is relying on the creditworthiness of the counterparty issuing the P-note and does not have the same rights under a P-note as it would as a shareholder of the underlying issuer. Therefore, if a counterparty becomes insolvent, the fund could lose the total value of its investment in the P-note. In addition, there is no assurance that there will be a trading market for a P-note or that the trading price of a P-note will equal the value of the underlying security.

International investing risk Investing in the securities of non-U.S. issuers involves special risks not typically associated with investing in U.S. issuers. International securities tend to be more volatile and less liquid than investments in U.S. securities, and may lose value because of adverse political, social, or economic developments overseas, or due to changes in the exchange rates between foreign currencies and the U.S. dollar. In addition, international investments are subject to settlement practices, and regulatory and financial reporting standards, that differ from those of the U.S.

Frontier markets risk The risks of international investing are heightened for investments in emerging market and frontier market countries. Emerging and frontier market countries tend to have economic structures that are less diverse and mature, and political systems that are less stable, than those of developed market countries. In addition to all of the risks of investing in international developed markets, emerging and frontier markets tend to have less liquid and efficient trading markets and are more susceptible to governmental interference, local taxes being imposed on international investments, and restrictions on gaining access to sales proceeds. Frontier markets generally have smaller economies or less mature capital markets than emerging markets and, as a result, the risks typically associated with investing in emerging market countries are magnified in frontier countries. Adverse changes in currency values of frontier market countries may be severe and settlement procedures and custody services may prove inadequate in certain markets. The markets of frontier countries typically have low trading volumes and the potential for extreme price volatility and illiquidity. This volatility may be further increased by the actions of a few major investors. For example, a substantial increase or decrease in cash flows of mutual funds investing in these markets could significantly affect local stock prices and, therefore, the net asset value of the fund. All of these factors make investing in frontier countries significantly riskier than investing in other countries, including emerging market countries.

Industry risk Because the fund may invest significantly in banking and financial services companies, the fund is more susceptible to adverse developments affecting such companies and may perform poorly during a downturn in the banking industry. Banks and other financial services companies can be adversely affected by, among other things, regulatory changes, interest rate movements, the availability of capital and cost to borrow, and the rate of debt defaults. The oversight of banks in frontier markets may be ineffective and underdeveloped relative to more mature markets. In particular for frontier markets, the impact of future regulation on any individual bank, or on the financial services sector as a whole, can be very difficult to predict.

Small- and mid-cap stock risk Because the fund may invest in companies of any size, its share price could be more volatile than a fund that invests only in large companies. Small- and medium-sized companies often have less experienced management, narrower product lines, more limited financial resources, and less publicly available information than larger companies. Smaller companies may have limited trading markets and tend to be more sensitive to changes in overall economic conditions.

Nondiversification risk As a nondiversified fund, the fund has the ability to invest a larger percentage of its assets in the securities of a smaller number of issuers than a diversified fund. As a result, poor performance by a single issuer could adversely affect fund performance more than if the fund were invested in a larger number of issuers. The fund’s share price can be expected to fluctuate more than that of a comparable diversified fund.

Performance

Because the fund commenced operations in 2014, there is no historical performance information shown here. Performance history will be presented after the fund has been in operation for one full calendar year.

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

[1] Other expenses are estimated for the current fiscal year.

[2] T. Rowe Price Associates, Inc. has agreed (through February 28, 2017) to waive its fees and/or bear any expenses (excluding interest, expenses related to borrowings, taxes and brokerage, extraordinary expenses, and acquired fund fees) that would cause the fund's ratio of expenses to average daily net assets to exceed 1.35%. Termination of the agreement would require approval by the fund's Board of Directors. Fees waived and expenses paid under this agreement are subject to reimbursement to T. Rowe Price Associates, Inc. by the fund whenever the fund's expense ratio is below 1.35%. However, no reimbursement will be made more than three years after the waiver or payment, or if it would result in the expense ratio exceeding 1.35% (excluding interest, expenses related to borrowings, taxes and brokerage, extraordinary expenses, and acquired fund fees).

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	T. Rowe Price Institutional International Funds, Inc.
Prospectus Date	rr_ProspectusDate	Aug. 22, 2014
T. Rowe Price Institutional Frontier Markets Equity Fund
Risk/Return:	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	T. Rowe Price Institutional Frontier Markets Equity Fund SUMMARY
Objective [Heading]	rr_ObjectiveHeading	Investment Objective
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	The fund seeks long-term growth of capital.
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 Caption [Text]	rr_ShareholderFeesCaption	Fees and Expenses of the Fund Shareholder fees (fees paid directly from your investment)
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)
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	February 28, 2017
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.
Other Expenses, New Fund, Based on Estimates [Text]	rr_OtherExpensesNewFundBasedOnEstimates	Other expenses are estimated for the current fiscal year.
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, the fund’s operating expenses remain the same, and the expense limitation currently in place is not renewed. 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 normally invests at least 80% of its net assets (including any borrowings for investment purposes) in equity securities and equity-related investments of companies that are located in, or that have economic ties to, countries considered to be frontier markets. The fund may purchase securities issued by companies of any size, but typically seeks larger companies. The fund expects to make most of its investments in companies in frontier markets in Africa, the Middle East, Asia, Europe, and Latin America. Frontier markets are those markets which are not as developed as emerging markets. The fund considers a country to be a frontier market if it is not included in the MSCI All Country World Index, which contains all of the countries that MSCI has classified as either a developed market or emerging market. The countries that are considered frontier markets may change over time based on how they are classified by MSCI, or another unaffiliated data provider. The fund expects to seek investments in the frontier markets listed below (other countries may be added or removed): Africa and Middle East: Bahrain, Botswana, Ghana, Jordan, Kenya, Kuwait, Lebanon, Mauritius, Morocco, Namibia, Nigeria, Oman, Saudi Arabia, Tanzania, Tunisia, Uganda, Zambia and Zimbabwe. Asia: Bangladesh, Cambodia, Pakistan, Sri Lanka, and Vietnam. Europe: Bosnia, Bulgaria, Croatia, Estonia, Georgia, Kazakhstan, Lithuania, Romania, Serbia, Slovenia, and Ukraine. Latin America: Argentina, Jamaica, Panama, and Trinidad & Tobago. The fund is “nondiversified,” meaning it may invest a greater portion of assets in a single company and own more of the company’s voting securities than is permissible for a “diversified” fund. Most of the fund’s assets will be invested directly in common stocks. The fund may also gain exposure to common stocks by purchasing participation notes (“P-notes”) that offer a return linked to a particular common stock. P-notes are primarily used to invest indirectly in certain stocks that trade in a market that restricts foreign investors, such as the fund, from investing directly in that market. While the fund invests with an awareness of the global economic backdrop and the outlook for industry sectors and individual countries, bottom-up stock selection is the focus of our decision-making. Country allocation is driven largely by stock selection, though we may limit investments in markets or industries that appear to have poor overall prospects. The fund expects to concentrate its investments (i.e., invest more than 25% of its total assets) in securities issued by banks and other financial services companies. The fund relies on a global team of investment analysts dedicated to in-depth fundamental research in an effort to identify quality companies with strong cash flows and sustainable growth potential, and does not emphasize either a growth or value bias when identifying potential investments. We generally select securities that in our view have the most favorable combination of company fundamentals, earnings potential, and relative valuation. 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. P-note risks To the extent the fund invests in P-notes, it is subject to certain risks in addition to the risks normally associated with a direct investment in the underlying foreign securities the P-note seeks to replicate. As the purchaser of a P-note, the fund is relying on the creditworthiness of the counterparty issuing the P-note and does not have the same rights under a P-note as it would as a shareholder of the underlying issuer. Therefore, if a counterparty becomes insolvent, the fund could lose the total value of its investment in the P-note. In addition, there is no assurance that there will be a trading market for a P-note or that the trading price of a P-note will equal the value of the underlying security. International investing risk Investing in the securities of non-U.S. issuers involves special risks not typically associated with investing in U.S. issuers. International securities tend to be more volatile and less liquid than investments in U.S. securities, and may lose value because of adverse political, social, or economic developments overseas, or due to changes in the exchange rates between foreign currencies and the U.S. dollar. In addition, international investments are subject to settlement practices, and regulatory and financial reporting standards, that differ from those of the U.S. Frontier markets risk The risks of international investing are heightened for investments in emerging market and frontier market countries. Emerging and frontier market countries tend to have economic structures that are less diverse and mature, and political systems that are less stable, than those of developed market countries. In addition to all of the risks of investing in international developed markets, emerging and frontier markets tend to have less liquid and efficient trading markets and are more susceptible to governmental interference, local taxes being imposed on international investments, and restrictions on gaining access to sales proceeds. Frontier markets generally have smaller economies or less mature capital markets than emerging markets and, as a result, the risks typically associated with investing in emerging market countries are magnified in frontier countries. Adverse changes in currency values of frontier market countries may be severe and settlement procedures and custody services may prove inadequate in certain markets. The markets of frontier countries typically have low trading volumes and the potential for extreme price volatility and illiquidity. This volatility may be further increased by the actions of a few major investors. For example, a substantial increase or decrease in cash flows of mutual funds investing in these markets could significantly affect local stock prices and, therefore, the net asset value of the fund. All of these factors make investing in frontier countries significantly riskier than investing in other countries, including emerging market countries. Industry risk Because the fund may invest significantly in banking and financial services companies, the fund is more susceptible to adverse developments affecting such companies and may perform poorly during a downturn in the banking industry. Banks and other financial services companies can be adversely affected by, among other things, regulatory changes, interest rate movements, the availability of capital and cost to borrow, and the rate of debt defaults. The oversight of banks in frontier markets may be ineffective and underdeveloped relative to more mature markets. In particular for frontier markets, the impact of future regulation on any individual bank, or on the financial services sector as a whole, can be very difficult to predict. Small- and mid-cap stock risk Because the fund may invest in companies of any size, its share price could be more volatile than a fund that invests only in large companies. Small- and medium-sized companies often have less experienced management, narrower product lines, more limited financial resources, and less publicly available information than larger companies. Smaller companies may have limited trading markets and tend to be more sensitive to changes in overall economic conditions. Nondiversification risk As a nondiversified fund, the fund has the ability to invest a larger percentage of its assets in the securities of a smaller number of issuers than a diversified fund. As a result, poor performance by a single issuer could adversely affect fund performance more than if the fund were invested in a larger number of issuers. The fund’s share price can be expected to fluctuate more than that of a comparable diversified fund.
Risk Lose Money [Text]	rr_RiskLoseMoney	The fund’s share price fluctuates, which means you could lose money by investing in the fund.
Risk Nondiversified Status [Text]	rr_RiskNondiversifiedStatus	Nondiversification risk As a nondiversified fund, the fund has the ability to invest a larger percentage of its assets in the securities of a smaller number of issuers than a diversified fund. As a result, poor performance by a single issuer could adversely affect fund performance more than if the fund were invested in a larger number of issuers. The fund’s share price can be expected to fluctuate more than that of a comparable diversified fund.
Bar Chart and Performance Table [Heading]	rr_BarChartAndPerformanceTableHeading	Performance
Performance Narrative [Text Block]	rr_PerformanceNarrativeTextBlock	Because the fund commenced operations in 2014, there is no historical performance information shown here. Performance history will be presented after the fund has been in operation for one full calendar year. Current performance information may be obtained through troweprice.com or by calling 1-800-638-8790.
Performance One Year or Less [Text]	rr_PerformanceOneYearOrLess	Because the fund commenced operations in 2014, there is no historical performance information shown here. Performance history will be presented after the fund has been in operation for one full calendar year.
Performance Availability Phone [Text]	rr_PerformanceAvailabilityPhone	1-800-638-8790
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	troweprice.com
T. Rowe Price Institutional Frontier Markets Equity Fund | T. Rowe Price Institutional Frontier Markets Equity Fund
Risk/Return:	rr_RiskReturnAbstract
Redemption fee (as a percentage of amount redeemed on shares held for 90 days or less)	rr_RedemptionFeeOverRedemption	2.00%
Management fees	rr_ManagementFeesOverAssets	1.10%
Other expenses	rr_OtherExpensesOverAssets	0.34%	[1]
Total annual fund operating expenses	rr_ExpensesOverAssets	1.44%
Fee waiver/expense reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(0.09%)	[2]
Total annual fund operating expenses after fee waiver/expense reimbursement	rr_NetExpensesOverAssets	1.35%	[2]
1 year	rr_ExpenseExampleYear01	$ 137
3 years	rr_ExpenseExampleYear03	$ 432

[1] Other expenses are estimated for the current fiscal year.

[2] T. Rowe Price Associates, Inc. has agreed (through February 28, 2017) to waive its fees and/or bear any expenses (excluding interest, expenses related to borrowings, taxes and brokerage, extraordinary expenses, and acquired fund fees) that would cause the fund's ratio of expenses to average daily net assets to exceed 1.35%. Termination of the agreement would require approval by the fund's Board of Directors. Fees waived and expenses paid under this agreement are subject to reimbursement to T. Rowe Price Associates, Inc. by the fund whenever the fund's expense ratio is below 1.35%. However, no reimbursement will be made more than three years after the waiver or payment, or if it would result in the expense ratio exceeding 1.35% (excluding interest, expenses related to borrowings, taxes and brokerage, extraordinary expenses, and acquired fund fees).

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	T. Rowe Price Institutional International Funds, Inc.
Prospectus Date	rr_ProspectusDate	Aug. 22, 2014
Document Creation Date	dei_DocumentCreationDate	Aug. 14, 2014

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Document Type	dei_DocumentType	485BPOS
Document Period End Date	dei_DocumentPeriodEndDate	Aug. 14, 2014
Registrant Name	dei_EntityRegistrantName	T. Rowe Price Institutional International Funds, Inc.
Central Index Key	dei_EntityCentralIndexKey	0000852254
Amendment Flag	dei_AmendmentFlag	false
Document Creation Date	dei_DocumentCreationDate	Aug. 14, 2014
Document Effective Date	dei_DocumentEffectiveDate	Aug. 19, 2014
Prospectus Date	rr_ProspectusDate	Aug. 22, 2014