Method of manufacturing a cover member for a push button switch

Reduce the influence on the circuit board caused by an impact or a hard-based deformation to the hard base. A cover member for a push button switch having a hard base 1 and the keypad 2, the hard base 1 is formed of a hard resin having a through hole 4 for the key top, the keypad 2 is made of a silicone rubber membrane that. The keypad 2, covers thinned backside entire surface of the hard base 1, exposed on the surface side of the hard base 1 through the inner circumferential edge of the through-hole 4 of the hard base 1. The back surface of the keypad 2 in the region inside the through-hole 4, the pressing projection 6a for pressing the contact portion is provided.