A reverse type stamp includes an outer cylindrical body, an inner cylindrical body which is movable relative to the outer cylindrical body, an elastic member that constantly urges the inner cylindrical body in a protruding direction inside the outer cylindrical body, an inversion body which is reversed and returned in synchronization with the relative movement, and a print body which is joined to the inversion body. When the outer cylindrical body is pressed down while the inner cylindrical body stands on a paper surface, the inversion body is reversed inside the inner cylindrical body for an imprinting operation. An ink pad is provided inside a movable container inside a cartridge. The movable container is elastically supported inside the cartridge by a coil spring provided at a rear surface thereof. Since contact between the ink pad and the print body is buffered, the sagging of the ink pad can be prevented.