<SEC-DOCUMENT>0001209191-04-037411-index.html : 20040727
<SEC-HEADER>0001209191-04-037411.hdr.sgml : 20040727
<ACCEPTANCE-DATETIME>20040727123203
ACCESSION NUMBER:		0001209191-04-037411
CONFORMED SUBMISSION TYPE:	4/A
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20040722
FILED AS OF DATE:		20040727

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MERCK & CO INC
		CENTRAL INDEX KEY:			0000064978
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				221109110
		STATE OF INCORPORATION:			NJ
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		ONE MERCK DR
		STREET 2:		P O BOX 100
		CITY:			WHITEHOUSE STATION
		STATE:			NJ
		ZIP:			08889-0100
		BUSINESS PHONE:		9084234044

	MAIL ADDRESS:	
		STREET 1:		ONE MERCK DR
		STREET 2:		PO BOX 100 WS3AB-05
		CITY:			WHITEHOUSE STATION
		STATE:			NJ
		ZIP:			08889-0100

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			BOSSIDY LAWRENCE A
		CENTRAL INDEX KEY:			0001187551

	FILING VALUES:
		FORM TYPE:		4/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-03305
		FILM NUMBER:		04932824

	BUSINESS ADDRESS:	
		STREET 1:		J. P. MORGAN CHASE & CO.
		STREET 2:		270 PARK AVE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017
		BUSINESS PHONE:		2122706000

	MAIL ADDRESS:	
		STREET 1:		J. P. MORGAN CHASE & CO.
		STREET 2:		270 PARK AVE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017
</SEC-HEADER>
<DOCUMENT>
<TYPE>4/A
<SEQUENCE>1
<FILENAME>doc4a.xml
<DESCRIPTION>FORM 4/A SUBMISSION
<TEXT>
Document 1 - file: doc4a.html

Document 1 - RAW XML: doc4a.xml

</DOCUMENT>
</SEC-DOCUMENT>