<SEC-DOCUMENT>0000950144-06-006379-index.html : 20060629
<SEC-HEADER>0000950144-06-006379.hdr.sgml : 20060629
<ACCEPTANCE-DATETIME>20060629172556
ACCESSION NUMBER:		0000950144-06-006379
CONFORMED SUBMISSION TYPE:	11-K
PUBLIC DOCUMENT COUNT:		4
CONFORMED PERIOD OF REPORT:	20051231
FILED AS OF DATE:		20060629
DATE AS OF CHANGE:		20060629

FILER:

	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

	FILING VALUES:
		FORM TYPE:		11-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-03305
		FILM NUMBER:		06934967

	BUSINESS ADDRESS:	
		STREET 1:		ONE MERCK DR
		STREET 2:		P O BOX 100
		CITY:			WHITEHOUSE STATION
		STATE:			NJ
		ZIP:			08889-0100
		BUSINESS PHONE:		9084231688

	MAIL ADDRESS:	
		STREET 1:		ONE MERCK DR
		STREET 2:		PO BOX 100 WS3AB-05
		CITY:			WHITEHOUSE STATION
		STATE:			NJ
		ZIP:			08889-0100
</SEC-HEADER>
<DOCUMENT>
<TYPE>11-K
<SEQUENCE>1
<FILENAME>g02178e11vk.htm
<DESCRIPTION>MERCK AND COMPANY, INC.
<TEXT>
Document 1 - file: g02178e11vk.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>2
<FILENAME>g02178exv23w1.htm
<DESCRIPTION>EX-23.1 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
<TEXT>
Document 2 - file: g02178exv23w1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>g02178g0217801.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: g02178g0217801.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>g02178g0217802.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: g02178g0217802.gif

</DOCUMENT>
</SEC-DOCUMENT>