The present invention can provide a switch for vehicle used to detect opening/closing of a car door or the like with a nice operation feeling and stable performances. A plurality of thin corrugated sections 16A is provided on cover 16 that covers the switching-element, connection points of the lead wires and lower portions of the cases. The switch for vehicle performs a nice operation feeling with quick response, as upon pushing the cap, corrugated sections 16A of cover 16 expand outward to prevent air in the switch from being compressed.