<SEC-DOCUMENT>0001104659-18-022182-index.html : 20180403
<SEC-HEADER>0001104659-18-022182.hdr.sgml : 20180403
<ACCEPTANCE-DATETIME>20180403163746
ACCESSION NUMBER:		0001104659-18-022182
CONFORMED SUBMISSION TYPE:	497
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20180403
DATE AS OF CHANGE:		20180403
EFFECTIVENESS DATE:		20180403

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MORGAN STANLEY INSTITUTIONAL FUND INC
		CENTRAL INDEX KEY:			0000836487
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			MD
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		497
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	033-23166
		FILM NUMBER:		18733953

	BUSINESS ADDRESS:	
		STREET 1:		522 FIFTH AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10036
		BUSINESS PHONE:		800-548-7786

	MAIL ADDRESS:	
		STREET 1:		522 FIFTH AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10036

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MORGAN STANLEY DEAN WITTER INSTITUTIONAL FUND INC
		DATE OF NAME CHANGE:	19990329

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MORGAN STANLEY INSTITUTIONAL FUND INC
		DATE OF NAME CHANGE:	19920703
<SERIES-AND-CLASSES-CONTRACTS-DATA>
<EXISTING-SERIES-AND-CLASSES-CONTRACTS>
<SERIES>
<OWNER-CIK>0000836487
<SERIES-ID>S000002826
<SERIES-NAME>EMERGING MARKETS PORTFOLIO
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000007746
<CLASS-CONTRACT-NAME>CLASS I
<CLASS-CONTRACT-TICKER-SYMBOL>MGEMX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000007747
<CLASS-CONTRACT-NAME>CLASS A
<CLASS-CONTRACT-TICKER-SYMBOL>MMKBX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000113803
<CLASS-CONTRACT-NAME>Class L
<CLASS-CONTRACT-TICKER-SYMBOL>MSELX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000126912
<CLASS-CONTRACT-NAME>Class IS
<CLASS-CONTRACT-TICKER-SYMBOL>MMMPX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000155890
<CLASS-CONTRACT-NAME>Class C
<CLASS-CONTRACT-TICKER-SYMBOL>MSEPX
</CLASS-CONTRACT>
</SERIES>
</EXISTING-SERIES-AND-CLASSES-CONTRACTS>
</SERIES-AND-CLASSES-CONTRACTS-DATA>
</SEC-HEADER>
<DOCUMENT>
<TYPE>497
<SEQUENCE>1
<FILENAME>a18-9524_1497.htm
<DESCRIPTION>497
<TEXT>
Document 1 - file: a18-9524_1497.htm

</DOCUMENT>
</SEC-DOCUMENT>