Affymetrix to Host Conference Call on April 21, 2004 to Announce First Quarter 2004 Results

Affymetrix to Host Conference Call on April 21, 2004 to Announce
First Quarter 2004 Results 


SANTA CLARA, Calif., April 14  /PRNewswire-FirstCall/ -- Affymetrix, Inc. 
today announced that it will release results for the first quarter of 2004
after close of the stock market on Wednesday, April 21, 2004.

Company management will also host a conference call at 2:00 p.m. PT on April 21
to discuss first quarter 2004 results and provide financial guidance for the
second quarter of 2004.  The dial-in number for domestic callers will be (888)
737-3798 and for international callers will be [phone].  A live webcast
of the conference call can be accessed by visiting Affymetrix' internet website
at http://www.affymetrix.com/ under the "Investors" tab.

A telephonic replay of the conference call will be available until 5:00 p.m. PT
on April 28, 2004.  The replay number for domestic callers will be (800)
642-1687 and for international callers will be [phone], passcode
6683630#.  An archived webcast of the conference call will be available under
the "Investors" section of the company's website at http://www.affymetrix.com/.
 The conference call, replay and webcast are open to all interested parties.

About Affymetrix:

Affymetrix is a pioneer in creating breakthrough tools that are driving the
genomic revolution. By applying the principles of semiconductor technology to
the life sciences, Affymetrix develops and commercializes systems that enable
scientists to improve the quality of life. The Company's customers include
pharmaceutical, biotechnology, agrichemical, diagnostics and consumer products
companies as well as academic, government and other non-profit research
institutes. Affymetrix offers an expanding portfolio of integrated products and
services, including its integrated GeneChip(R) brand platform, to address
growing markets focused on understanding the relationship between genes and
human health. Additional information on Affymetrix can be found at
http://www.affymetrix.com/. 

DATASOURCE: Affymetrix, Inc.



CONTACT:  Doug Farrell, Vice President of Investor Relations of

Affymetrix, Inc., [phone]



Web site:  http://www.affymetrix.com/ 

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