To prevent the forgetfulness of a changeover from a shower to a cock after the completion of the shower.

In a cock with a branch cock for a shower, a valve 5 being rotated at a fulcrum 6 by the weight of lever 4 itself and closing a shower branch line is installed. When a valve for the cock is opened and a lever 4 is lifted during the usage of hot water or water, the valve 5 is pushed down by the water pressure of water 1 reaching from the valve, the lever 4 is held, and water is used as the shower. When the valve for the cock is closed, water pressure is lowered, force holding down the valve 5 is weakened, the valve 5 is turned by the weight of the lever 4, and the shower branch line is returned to closing.