Harris & Harris Group Inc.

PRESS RELEASE

HARRIS & HARRIS GROUP, INC.	JUNE 23, 2006
111 WEST 57TH STREET
NEW YORK, NEW YORK 10019
NASDAQ/NMS SYMBOL: TINY
CONTACT: CHARLES E. HARRIS
TEL. NO. (212) 582-0900

HARRIS & HARRIS GROUP INVESTS $750,000 IN SIONYX, INC.

Harris & Harris Group, Inc., announced today that it invested $750,000 in a seed round of financing of privately held SiOnyx, Inc. SiOnyx is located in Cambridge, Massachusetts, and is a spinout of Harvard University. SiOnyx is developing silicon-based optoelectronic products enabled by its proprietary, "Black Silicon."

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 30 initial private equity investments have been in tiny technology-enabled companies. The Company has 20,756,345 common shares outstanding.

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

This press 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 press 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. The reference to the website www.TinyTechVC.com has been provided as a convenience, and the information contained on such website is not incorporated by reference into this press release.