To solve a problem that a negative pressure occurs between a check valve and a delivery stop valve when a check valve is situated in the middle of a flow passage to prevent the occurrence of a water hammer due to a rebound of a pressure from the shower head side and an abnormal noise occurs due to a flow of water into a negative pressure occurrence spot when shower discharge occurs.

A check valve 79 consists of a valve element 84 having a valve plate 90 and a shaft part 94; a valve seat 86; and a first spring 102 energizing the valve element 84 in a closing direction. A notched part 104 is formed in the outer peripheral part of the valve plate 90 of the valve element 84 to form a leak part through which a pressure is released.