UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): March 22, 2007

AFFYMETRIX, INC.

(Exact name of registrant as specified in its charter)

DELAWARE	0-28218	77-0319159
(State of incorporation)	(Commission File Number)	(IRS Employer Identification No.)

3420 Central Expressway
Santa Clara, California 95051

(Address of principal executive offices) (Zip Code)

(408) 731-5000

Registrant’s telephone number, including area code

N/A

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On March 22, 2007, Susan E. Siegel, President Emeritus of Affymetrix, Inc. (the “Company”), gave notice of her resignation from the Company effective March 22, 2007. In connection with her resignation, Ms. Siegel will receive certain benefits that are described in an agreement with the Company dated May 30, 2006 which is filed as Exhibit 10.1 to the Company’s Form 8-K dated June 5, 2006.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	AFFYMETRIX, INC.


	By:	/s/ Barbara A. Caulfield
		Name: Barbara A. Caulfield
		Title: Executive Vice President and General Counsel

Dated: March 23, 2007