PURPOSE: To eliminate the need for the formation of a water spout to a lavatory bowl, and to conduct manufacture and execution of works easily.

CONSTITUTION: A column 9 with a cock 1 and a water spout 3 for washing a lavatory bowl is mounted to the lavatory bowl 2, and wash water can be discharged from the water spout 3, thus eliminating the need for the formation of a water spout 5, etc., to the lavatory bowl 2. A changeover means 4 changing over the column to the cock 1 or the water spout 3 and capable of supplying water is installed to the column 9, piping is conducted only to the coin 9, and wash water for washing the lavatory bowl and wash water for washing a hand, etc., can be selected.