To provide an auxiliary washing device simply and easily saving a detergent, water, electric power, and time by a method to quickly prepare concentrated washing water with bath water to dip washing in and keep dipping for a predetermined time to effectively dissolve soil using in combination with a bucket.

Band shape supports (2) are raised at both ends of a horizontal handle (1) and fixed to a top plate (3) positioned thereunder. Upper ends of four supports (4) are fixed slightly to the center on the back face of the top plate to form trapezoids downward. Lower ends of the four supports (4) are fixed to the peripheral inside of a pressure plate (5) with a plurality of holes at the center part to structure the auxiliary washing device.