SEC FORM 3

SEC Form 3

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
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

MacDonald Robert D III

(Last)

(First)

(Middle)

3M CENTER

(Street)

ST. PAUL

55144

(City)

(State)

(Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
10/01/2004

3. Issuer Name and Ticker or Trading Symbol
3M CO [ MMM ]

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	VICE PRESIDENT MARKETING

5. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

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	10,798	D
Common Stock	1,693	I	by 401k/PAESOP Trust
Common Stock	9,614	I	by Spouse

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: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivative Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
Incentive Stock Option (right to buy)	05/09/1996	05/09/2005	Common Stock	3,490	$28.6348	D
Incentive Stock Option (right to buy)	05/14/1997	05/14/2006	Common Stock	3,172	$31.5175	D
Incentive Stock Option (right to buy)	05/09/2001	05/09/2010	Common Stock	2,306	$43.35	D
Incentive Stock Option (right to buy)	05/13/1998	05/13/2007	Common Stock	2,180	$45.85	D
Incentive Stock Option (right to buy)	05/12/1999	05/12/2008	Common Stock	2,142	$46.675	D
Incentive Stock Option (right to buy)	05/11/2000	05/10/2009	Common Stock	2,104	$47.5	D
Incentive Stock Option (right to buy)	05/08/2002	05/08/2011	Common Stock	1,704	$58.625	D
Non-Qualified Stock Option (right to buy)	05/08/2002	05/08/2011	Common Stock	14,096	$58.625	D
Non-Qualified Stock Option (right to buy)	11/13/2003	05/06/2005	Common Stock	4,108	$61.85	D
Non-Qualified Stock Option (right to buy)	11/13/2003	05/12/2006	Common Stock	5,220	$61.85	D
Non-Qualified Stock Option (right to buy)	11/13/2003	05/11/2009	Common Stock	6,344	$61.85	D
Non-Qualified Stock Option (right to buy)	11/13/2003	05/07/2010	Common Stock	1,518	$61.85	D
Non-Qualified Stock Option (right to buy)	05/14/2004	05/12/2013	Common Stock	17,380	$61.85	D
Non-Qualified Stock Option (right to buy)	04/16/2003	05/11/2007	Common Stock	6,958	$61.9	D
Non-Qualified Stock Option (right to buy)	04/16/2003	05/12/2008	Common Stock	7,066	$61.9	D
Non-Qualified Stock Option (right to buy)	04/16/2003	05/11/2009	Common Stock	828	$61.9	D
Non-Qualified Stock Option (right to buy)	04/16/2003	05/07/2010	Common Stock	4,124	$61.9	D
Non-Qualified Stock Option (right to buy)	05/15/2003	05/14/2012	Common Stock	15,800	$64.5	D
Non-Qualified Stock Option (right to buy)	05/12/2005	05/09/2014	Common Stock	15,010	$84.4	D

Explanation of Responses:

	By: George Ann Biros For: Robert D MacDonald	10/01/2004
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.