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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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<SEC-DOCUMENT>0000950136-04-002123.txt : 20040630
<SEC-HEADER>0000950136-04-002123.hdr.sgml : 20040630
<ACCEPTANCE-DATETIME>20040630163431
ACCESSION NUMBER:		0000950136-04-002123
CONFORMED SUBMISSION TYPE:	497
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20040630
EFFECTIVENESS DATE:		20040630

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MORGAN STANLEY VARIABLE INVESTMENT SERIES
		CENTRAL INDEX KEY:			0000716716
		IRS NUMBER:				133178476
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		497
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	002-82510
		FILM NUMBER:		04891717

	BUSINESS ADDRESS:	
		STREET 1:		C/O MORGAN STANLEY TRUST
		STREET 2:		HARBORSIDE FINANCIAL CENTER, PLAZA TWO
		CITY:			JERSEY CITY
		STATE:			NJ
		ZIP:			07311
		BUSINESS PHONE:		(212) 869-6397

	MAIL ADDRESS:	
		STREET 1:		C/O MORGAN STANLEY TRUST
		STREET 2:		HARBORSIDE FINANCIAL CENTER, PLAZA TWO
		CITY:			JERSEY CITY
		STATE:			NJ
		ZIP:			07311

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MORGAN STANLEY DEAN WITTER VARIABLE INVESTMENT SERIES
		DATE OF NAME CHANGE:	19980622

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	DEAN WITTER VARIABLE INVESTMENT SERIES
		DATE OF NAME CHANGE:	19930209

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	WITTER DEAN VARIABLE INVESTMENT SERIES
		DATE OF NAME CHANGE:	19920703
</SEC-HEADER>
<DOCUMENT>
<TYPE>497
<SEQUENCE>1
<FILENAME>file001.txt
<DESCRIPTION>DEFINITIVE MATERIALS
<TEXT>
<PAGE>


                                                   Filed Pursuant to Rule 497(e)
                                                  Registration File No.: 2-82510


                                                                   June 30, 2004
                                                                      Supplement

[MORGAN STANLEY LOGO OMITTED]


              SUPPLEMENT DATED JUNE 30, 2004 TO THE PROSPECTUS OF
             MORGAN STANLEY VARIABLE INVESTMENT SERIES -- CLASS X
                               Dated May 1, 2004


The seventeenth paragraph of the section of the Prospectus titled "PORTFOLIO
MANAGEMENT" is hereby replaced by the following:


   Aggressive Equity Portfolio -- The Portfolio is managed within the U.S.
   Growth team. Current members of the team include Dennis Lynch, a Managing
   Director of the Investment Manager, David Cohen, an Executive Director of
   the Investment Manager, and Sam Chainani, a Vice President of the
   Investment Manager.


              PLEASE RETAIN THIS SUPPLEMENT FOR FUTURE REFERENCE.


</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----