A bumper cap is used for a shock absorber. The shock absorber includes a cylinder, a piston and piston rod. The bumper cap is at an end part of the cylinder on a side from which the piston rod extends and is formed by die casting or injection molding, and includes a lid coming into contact with an axial end surface of the cylinder and having a through hole through which the piston rod is inserted. A cylindrical portion has a cylindrical shape provided radially outward from the through hole and an outer circumferential surface of the cylinder. A communication hole in the cylindrical portion permits communication between inner and outer circumferential surfaces of the cylindrical portion. An edge of the communication hole is narrower on the first end part side positioned downstream than at the second end part positioned upstream through which a material flows in during molding.