FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person *   Kuhlik Bruce N 2. Date of Event Requiring Statement (Month/Day/Year) 08/01/2007 3. Issuer Name and Ticker or Trading Symbol MERCK & CO INC [(MRK)] (Last) (First) (Middle) MERCK & CO., INC., ONE MERCK DRIVE 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Sr.VP & General Counsel 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) WHITEHOUSE STATION, NJ 08889-0100 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Beneficially Owned

1.Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5) Common Stock - Dividend Reinvestment 5,595.7724 (1) D Â

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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Employee Stock Option 2005/05/23 (right to buy)	05/23/2006(2)	05/22/2015	Common Stock	10,000	$ 32.72	D	Â
Employee Stock Option 2006/02/01 (right to buy)	02/01/2007(3)	01/31/2016	Common Stock	500	$ 34.47	D	Â
Employee Stock Option 2006/03/03 (right to buy)	03/03/2007(4)	03/02/2016	Common Stock	20,880	$ 35.09	D	Â
Employee Stock Option 2007/03/02 (right to buy)	03/02/2008(5)	03/01/2017	Common Stock	24,000	$ 44.19	D	Â
Restricted Stock Units 2005/05/23	05/23/2008	05/23/2008	Common Stock	4,000	$ (6)	D	Â
Restricted Stock Units 2006/03/03	03/03/2009	03/03/2009	Common Stock	3,915	$ (6)	D	Â
Restricted Stock Units 2007/03/02	03/02/2010	03/02/2010	Common Stock	4,500	$ (6)	D	Â
RSU - Leader Shares 2005/11/28	11/28/2008	11/28/2008	Common Stock	10,500	$ (6)	D	Â
RSU - Leader Shares 2007/02/01	02/01/2010	02/01/2010	Common Stock	3,700	$ (6)	D	Â

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Kuhlik Bruce N MERCK & CO., INC. ONE MERCK DRIVE WHITEHOUSE STATION, NJ 08889-0100	Â	Â	  Sr.VP & General Counsel	Â

Signatures

Bruce N. Kuhlik		08/02/2007
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Holdings include shares acquired in dividend reinvestment transactions.
(2)	The option vests in three equal annual installments beginning May 23, 2006.
(3)	The option vests in three equal annual installments beginning February 1, 2007.
(4)	The option vests in three equal annual installments beginning March 3, 2007.
(5)	The option vests in three equal annual installments beginning March 2, 2008.
(6)	Each restricted stock unit represents a contingent right to receive one share of Merck & Co., Inc. common stock.

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