Abstract: The present invention provides a rebound stopper which achieves reduction of hitting noise. In an approximately cylindrical urethane-made rebound stopper 100 which is attached to an outer circumference of a rod 500 arranged reciprocably in a cylinder 600 while being arranged as having one end side faced to a rebound sheet 510 and having the other end side faced to a rod guide 610 and which absorbs impact as being compressed by the rebound sheet 510 and the rod guide 610 as the other end side hitting the rod guide 610 when the rod 500 is moved in a direction in which the rebound sheet 510 approaches to the rod guide 610, a plurality of protruding portions is arranged at each end side while the protruding portions at one end side and the protruding portions at the other end side are arranged at positions as being shifted in the circumferential direction.