FORM 3
        	UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES
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                      	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	                      	

1. Name and Address of Reporting Person *

Lacey Roger HD	2. Date of Event Requiring Statement (MM/DD/YYYY)
1/1/2010 
	3. Issuer Name and Ticker or Trading Symbol

3M CO [MMM]	
(Last)        (First)        (Middle)

3M CENTER	4. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director                            _____ 10% Owner
___ X ___ Officer (give title below)          _____ Other (specify below)
Senior Vice President /	
(Street)

ST. PAUL, MN 55144-1000       

(City)              (State)              (Zip)	5. If Amendment, Date Original Filed (MM/DD/YYYY)

	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  	22222  	D  	 	
Common Stock  	290  	I  	By 401k/paesop Trust  	

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)	
1. Title of Derivate Security
(Instr. 4)	2. Date Exercisable and Expiration Date
(MM/DD/YYYY)	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				
Restricted Stock Units  	  (1)	  (1)	Common Stock  	3279.346  	$0   (2)	D  	 	
Incentive Stock Option (Right to Buy)  	5/9/2001  	5/7/2010  	Common Stock  	1780  	$43.35  	D  	 	
Incentive Stock Option (Right to Buy)  	5/8/2002  	5/6/2011  	Common Stock  	1704  	$58.625  	D  	 	
Non-qualified Stock Option (Right to Buy)  	10/19/2004  	5/6/2011  	Common Stock  	1593  	$83.95  	D  	 	
Non-qualified Stock Option (Right to Buy)  	5/12/2005  	5/9/2014  	Common Stock  	23339  	$84.40  	D  	 	
Non-qualified Stock Option (Right to Buy)  	8/9/2005  	5/13/2013  	Common Stock  	4930  	$86.50  	D  	 	
Non-qualified Stock Option (Right to Buy)  	8/10/2005  	8/8/2014  	Common Stock  	3334  	$80.05  	D  	 	
Non-qualified Stock Option (Right to Buy)  	9/8/2005  	5/6/2011  	Common Stock  	14329  	$86.50  	D  	 	
Non-qualified Stock Option (Right to Buy)  	5/10/2006  	5/8/2015  	Common Stock  	17043  	$76.80  	D  	 	
Non-qualified Stock Option (Right to Buy)  	10/11/2006  	5/13/2013  	Common Stock  	14113  	$80.65  	D  	 	
Non-qualified Stock Option (Right to Buy)  	5/9/2007  	5/9/2016  	Common Stock  	17693  	$87.35  	D  	 	
Non-qualified Stock Option (Right to Buy)  	1/26/2008  	5/7/2010  	Common Stock  	5225  	$90.35  	D  	 	
Non-qualified Stock Option (Right to Buy)  	1/26/2008  	5/14/2012  	Common Stock  	19476  	$90.35  	D  	 	
Non-qualified Stock Option (Right to Buy)  	1/26/2008  	5/13/2013  	Common Stock  	203  	$90.35  	D  	 	
Non-qualified Stock Option (Right to Buy)  	1/26/2008  	5/9/2014  	Common Stock  	6154  	$90.35  	D  	 	
Non-qualified Stock Option (Right to Buy)  	5/8/2008   (3)	5/8/2017  	Common Stock  	12068  	$84.78  	D  	 	
Non-qualified Stock Option (Right to Buy)  	5/13/2009   (4)	5/13/2018  	Common Stock  	13164  	$77.18  	D  	 	
Non-qualified Stock Option (Right to Buy)  	2/9/2010   (5)	2/8/2019  	Common Stock  	16192  	$54.11  	D  	 	

Explanation of Responses:	
(  1) 	The restricted stock units will vest 100% three years from the grant date (2/9/2009).	
(  2) 	Each restricted stock unit represents a contingent right to receive one share of 3M common stock.	
(  3) 	This option vests in three equal annual installments beginning one year from the grant date (5/8/2007).	
(  4) 	This option vests in three equal annual installments beginning one year from the grant date (5/13/2008).	
(  5) 	This option vests in three equal annual installments beginning one year from the grant date (2/9/2009).	

Reporting Owners	
Reporting Owner Name / Address	Relationships	
	Director	10% Owner	Officer	Other	
Lacey Roger HD
3M CENTER
ST. PAUL, MN 55144-1000			Senior Vice President		

Signatures		
George Ann Biros, attorney-in-fact for Roger H.D. Lacey		1/6/2010	
** 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 control number.