<SEC-DOCUMENT>0000950123-06-003031-index.html : 20061201
<SEC-HEADER>0000950123-06-003031.hdr.sgml : 20061201

<ACCEPTANCE-DATETIME>20060313161045

<PRIVATE-TO-PUBLIC>

ACCESSION NUMBER:		0000950123-06-003031

CONFORMED SUBMISSION TYPE:	10-K

PUBLIC DOCUMENT COUNT:		17

CONFORMED PERIOD OF REPORT:	20051231

FILED AS OF DATE:		20060313

DATE AS OF CHANGE:		20060929


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:		10-K

		SEC ACT:		1934 Act

		SEC FILE NUMBER:	001-03305

		FILM NUMBER:		06682263



	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>10-K
<SEQUENCE>1
<FILENAME>y18212e10vk.htm
<DESCRIPTION>FORM 10-K
<TEXT>
Document 1 - file: y18212e10vk.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-12
<SEQUENCE>2
<FILENAME>y18212exv12.htm
<DESCRIPTION>EX-12: COMPUTATION OF RATIOS OF EARNINGS TO FIXED CHARGES
<TEXT>
Document 2 - file: y18212exv12.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-13
<SEQUENCE>3
<FILENAME>y18212exv13.htm
<DESCRIPTION>EX-13: PORTIONS OF 2005 ANNUAL REPORT TO STOCKHOLDERS
<TEXT>
Document 3 - file: y18212exv13.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-21
<SEQUENCE>4
<FILENAME>y18212exv21.htm
<DESCRIPTION>EX-21: SUBSIDIARIES OF MERCK & CO., INC.
<TEXT>
Document 4 - file: y18212exv21.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24.1
<SEQUENCE>5
<FILENAME>y18212exv24w1.htm
<DESCRIPTION>EX-24.1: POWER OF ATTORNEY
<TEXT>
Document 5 - file: y18212exv24w1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24.2
<SEQUENCE>6
<FILENAME>y18212exv24w2.htm
<DESCRIPTION>EX-24.2: CERTIFIED RESOLUTION OF BOARD OF DIRECTORS
<TEXT>
Document 6 - file: y18212exv24w2.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-31.1
<SEQUENCE>7
<FILENAME>y18212exv31w1.htm
<DESCRIPTION>EX-31.1: CERTIFICATION
<TEXT>
Document 7 - file: y18212exv31w1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-31.2
<SEQUENCE>8
<FILENAME>y18212exv31w2.htm
<DESCRIPTION>EX-31.2: CERTIFICATION
<TEXT>
Document 8 - file: y18212exv31w2.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-32.1
<SEQUENCE>9
<FILENAME>y18212exv32w1.htm
<DESCRIPTION>EX-32.1: CERTIFICATION
<TEXT>
Document 9 - file: y18212exv32w1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-32.2
<SEQUENCE>10
<FILENAME>y18212exv32w2.htm
<DESCRIPTION>EX-32.2: CERTIFICATION
<TEXT>
Document 10 - file: y18212exv32w2.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>12
<FILENAME>y18212y1821201.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 12 - file: y18212y1821201.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>13
<FILENAME>y18212y1821202.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 13 - file: y18212y1821202.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>14
<FILENAME>y18212y1821203.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 14 - file: y18212y1821203.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>15
<FILENAME>y18212y1821204.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 15 - file: y18212y1821204.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>16
<FILENAME>y18212y1821205.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 16 - file: y18212y1821205.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>17
<FILENAME>y18212y1821206.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 17 - file: y18212y1821206.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>COVER
<SEQUENCE>18
<FILENAME>filename18.htm
<TEXT>
Document 18 - file: filename18.htm

</DOCUMENT>
</SEC-DOCUMENT>