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: CAMPBELL PATRICK D (VICE PRESIDENT FINANCE & CFO)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2006-05-09	Non-Qualified Stock Option (right to buy)	$87.35	A	73000	Acquired	2016-05-09	Common Stock (73000)	Direct