Harris & Harris Group Inc.

NEWS RELEASE

HARRIS & HARRIS GROUP, INC.	MAY 13, 2005
111 WEST 57TH STREET
NEW YORK, NEW YORK 10019
NASDAQ/NMS SYMBOL: TINY
CONTACT: CHARLES E. HARRIS
TEL. NO. (212) 582-0900

NANOMIX ANNOUNCEMENT

Shareholders of Harris & Harris Group, Inc., may be interested to know that Nanomix, Inc., announced yesterday that it has an ultra low-power, highly specific hydrogen detection device available for delivery. These scaleable, nanoelectronic devices use ultra-sensitive nanotube sensing elements combined with proprietary chemistry. Nanomix has appointed KWJ Engineering as its first distributor.

Harris & Harris Group has invested $2,500,000 in Nanomix.

Harris & Harris Group is a publicly traded venture capital company that now makes initial investments exclusively in tiny technology, including nanotechnology, microsystems and microelectromechanical systems (MEMS). The Company's last 22 initial private equity investments have been in tiny-technology enabled companies.

Harris & Harris Group is a business development company with 17,248,845 common shares outstanding.

Detailed information about Harris & Harris Group and its holdings can be found on its website at www.TinyTechVC.com.

This news release may contain statements of a forward-looking nature relating to future events. These forward-looking statements are subject to the inherent uncertainties in predicting future results and conditions. These statements reflect the Company's current beliefs, and a number of important factors could cause actual results to differ materially from those expressed in this news release. Please see the Company's Annual Report on Form 10-K filed with the Securities and Exchange Commission for a more detailed discussion of the risks and uncertainties associated with the Company's business, including but not limited to the risks and uncertainties associated with venture capital investing and other significant factors that could affect the Company's actual results. Except as otherwise required by Federal securities laws, Harris & Harris Group, Inc., undertakes no obligation to update or revise these forward-looking statements to reflect new events or uncertainties.