Dov Béla Gruner (Hebrew: דב בלה גרונר‎; 1912–1947) was a Hungarian-born Zionist activist in Mandatory Palestine and a member of the pre-state Jewish underground Irgun. On April 16, 1947, Gruner was executed by the British Mandatory authorities in Palestine on charges of "firing on policemen and setting explosive charges with the intent of killing personnel on His Majesty's service." He is honored as one of the Olei Hagardom, the twelve Jewish pre-independence fighters who were executed by British and Egyptian authorities.