3M CO — Director's Dealing 2006

May 11, 2006

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: 3M CO (MMM)
CIK: 0000066740
Period of Report: 2006-05-09

Reporting Person: PALENSKY FRED J (EXEC VP ENTERPRISE SVCS)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2006-05-09	Common Stock	M	2552	$76.45	Acquired	35063	Direct
2006-05-09	Common Stock	F	2234	$87.31	Disposed	32829	Direct
2006-05-09	Common Stock	F	103	$87.31	Disposed	32726	Direct
2006-05-09	Common Stock	M	2255	$76.45	Acquired	34981	Direct
2006-05-09	Common Stock	F	1974	$87.31	Disposed	33007	Direct
2006-05-09	Common Stock	F	91	$87.31	Disposed	32916	Direct
2006-05-09	Common Stock	M	6856	$63.525	Acquired	39772	Direct
2006-05-09	Common Stock	F	4988	$87.31	Disposed	34784	Direct
2006-05-09	Common Stock	F	664	$87.31	Disposed	34120	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2006-05-09	Non-Qualified Stock Option (right to buy)	$63.525	M	6856	Disposed	2007-05-11	Common Stock (6856)	Direct
2006-05-09	Non-Qualified Stock Option (right to buy)	$76.45	M	2552	Disposed	2006-05-12	Common Stock (2552)	Direct
2006-05-09	Non-Qualified Stock Option (right to buy)	$76.45	M	2255	Disposed	2006-05-12	Common Stock (2255)	Direct
2006-05-09	Non-Qualified Stock Option (right to buy)	$87.35	A	52000	Acquired	2016-05-09	Common Stock (52000)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	3393	Indirect