BATHTUB WASHING DEVICE

PROBLEM TO BE SOLVED: To provide a bathtub washing device that can surely prevent stains inside a passage on the collecting side in a water storage tank or the like, incidental to rinsing performance, and that can surely prevent occurrence of malfunction due to intrusion of stains, or the like, in a circulation washing device.SOLUTION: As prerinsing performed before executing circulation washing, bathtub rinsing and tank rinsing are carried out, and tank rinsing is performed as the final processing. In the bathtub rinsing, with a circulation pump operated, hot water supplied from a hot water supply passage 43 to a washing water supply passage 32 is branched with a distribution ratio of a flow rate Qa on the side of a washing nozzle 31, and a flow rate Qb (Qa>Qb) on the side of the water storage tank 34. In the tank rinsing, by switching the circulation pump to non-operation, branching is performed with a distribution ratio of the flow rate Qb on the side of the washing nozzle 31, and the flow rate Qa on the side of the water storage tank 34.