A first load transmission surface 54 and a second load transmission surface 56 are each formed as a flat surface extending parallel to a load input direction. Therefore, elastic deformation occurring in each of an outer body part 66 and an inner body part 68 in a stopper elastic body 64 includes a main component of a shear deformation component, and a secondary component of a compressive and tensile deformation component that is small relative to the shear deformation component. Consequently, a sharp increase in deformation resistance and dynamic spring constant when a high load is input can be effectively suppressed.