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: 2006-05-10

Reporting Person: SAUER BRAD T (EXEC VP HEALTH CARE)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2006-05-10	Common Stock	M	6290	$58.625	Acquired	18660	Direct
2006-05-10	Common Stock	F	4214	$87.495	Disposed	14446	Direct
2006-05-10	Common Stock	F	678	$87.495	Disposed	13768	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2006-05-10	Non-Qualified Stock Option (right to buy)	$58.625	M	6290	Disposed	2011-05-08	Common Stock (6290)	Direct
2006-05-10	Non-Qualified Stock Option (right to buy)	$87.5	A	4892	Acquired	2011-05-06	Common Stock (4892)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	876	Indirect