A self-inking hand stamp includes a frame made of metal and having two side walls which are interconnected by an upper cover wall, and an actuating bow made of metal, which in use is downwardly movable relative to the frame against a spring force. The actuating bow has two legs protruding from an upper web, which are displaceable along the side walls of the frame and coupled with a type unit arranged to be upwardly and downwardly displaceable and turnable within the frame. Two parallel guide webs laterally abutting on the respective bow leg, which is rectangular in elevation and narrower as compared to the frame side wall, are latchingly attached to the outer side of each side wall of the frame in the upper region thereof.