MONTREAL, QUEBEC--(Marketwire - Feb. 2, 2012) - Osisko Mining Corporation ("Company") (TSX:OSK)(FRANKFURT:EWX) announces with regret that Mr. Richard A. Ross, C.A. has tendered his resignation to the Board of Directors so that he may focus on family matters.

Victor H. Bradley, Chairman of the Board of Directors, commenting on Mr. Ross's resignation stated: "We are extremely sorry to see Mr. Ross depart, and have with great reluctance accepted his resignation. Although he was with us for only a short period, Richard was a highly appreciated member of the Board and his insight, experience and input will be missed. He has all of our best wishes."

About Osisko Mining Corporation

Osisko Mining Corporation operates the Canadian Malartic Gold Mine in Malartic, Quebec and is pursuing exploration on a number of properties, including the Hammond Reef Gold Project in Northern Ontario. Canadian Malartic's production is 100% unhedged.

FOR FURTHER INFORMATION PLEASE CONTACT:

Vice-President Corporate Development
John Burzynski
(416) 363-8653
www.osisko.com

OR

Director of Investor Relations
Sylvie Prud'homme
(514) 735-7131
Toll Free: 1-888-674-7563