To provide a prewashing accessory in use for washing, capable of easily and previously removing particularly stiff dirty portions of socks by using an accessory mainbody and a brush.

Hair-planted cloth members 3, 5 are provided at a front 2 and a heel 4, excluding an arched portion 1 at the rear of a foot, of an accessory mainbody A which is formed with a wooden boot model upside down and a weight 7 formed of metal of heavy specific gravity such as iron and lead is embedded in the bottom of the accessory mainbody A so that the bottom can be flatly exposed to the accessory mainbody A. A magnet 8 is embedded in the exposed surface of the embedded weight 7 so as to be flat therewith. A hanger 9 is provided at the bottom edge of the accessory mainbody A and a pair of brushes with handles are provided separately on the accessory mainbody A.