<SEC-DOCUMENT>0000846800-18-000002-index.html : 20180301
<SEC-HEADER>0000846800-18-000002.hdr.sgml : 20180301
<ACCEPTANCE-DATETIME>20180301114242
ACCESSION NUMBER:		0000846800-18-000002
CONFORMED SUBMISSION TYPE:	NSAR-B
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20171231
FILED AS OF DATE:		20180301
DATE AS OF CHANGE:		20180301
EFFECTIVENESS DATE:		20180301

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			DREYFUS STOCK INDEX FUND INC
		CENTRAL INDEX KEY:			0000846800
		IRS NUMBER:				133537664
		STATE OF INCORPORATION:			NY
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		NSAR-B
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-05719
		FILM NUMBER:		18655407

	BUSINESS ADDRESS:	
		STREET 1:		THE DREYFUS CORPORATION
		STREET 2:		200 PARK AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10166
		BUSINESS PHONE:		2129226400

	MAIL ADDRESS:	
		STREET 1:		C/O DREYFUS CORP
		STREET 2:		200 PARK AVENUE, 7TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10166

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	DREYFUS LIFE & ANNUITY INDEX FUND INC
		DATE OF NAME CHANGE:	19920703
<SERIES-AND-CLASSES-CONTRACTS-DATA>
<EXISTING-SERIES-AND-CLASSES-CONTRACTS>
<SERIES>
<OWNER-CIK>0000846800
<SERIES-ID>S000001911
<SERIES-NAME>Dreyfus Stock Index Fund, Inc.
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000005028
<CLASS-CONTRACT-NAME>Dreyfus Stock Index Fund, Inc. - Initial Shares
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000005029
<CLASS-CONTRACT-NAME>Dreyfus Stock Index Fund, Inc. - Service Shares
</CLASS-CONTRACT>
</SERIES>
</EXISTING-SERIES-AND-CLASSES-CONTRACTS>
</SERIES-AND-CLASSES-CONTRACTS-DATA>
</SEC-HEADER>
<DOCUMENT>
<TYPE>NSAR-B
<SEQUENCE>1
<FILENAME>ANSWER.FIL
<DESCRIPTION>ANNUAL NSAR
<TEXT>
Document 1 - file: ANSWER.FIL

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.77B ACCT LTTR
<SEQUENCE>2
<FILENAME>acctlr763-32018.htm
<DESCRIPTION>ACCOUNTANT'S REPORT ON INTERNAL CONTROL
<TEXT>
Document 2 - file: acctlr763-32018.htm

</DOCUMENT>
</SEC-DOCUMENT>