PURPOSE: To wash deep dishes easily, surely and quickly by providing both a washing part which holds a washing body having a holding slit formed of a pair of holding surfaces facing to each other and a detergent-storing part wherefrom a detergent is freely supplied to the washing part through a connecting part for this washing part.

CONSTITUTION: In a washing part 2, a slender washing body 6 is stuck and held in the inside of a holding body 5 formed in the form of an almost split cylinder. The holding body 5 is made of rigid plastic and the washing body 6, of nonwoven fabric. In the washing body 6, a holding slit 8 formed of a pair of holding surfaces 7a, 7b facing to each other, is formed. When the side wall Cw of a cup is held between them, both the holding surfaces 7a, 7b of the washing body 6 are properly thrust by the elasticity of the holding body 5. A detergent-storing part 4 is a detergent case made of synthetic resin, and when it is pressed from the outside and is deformed, a liquid detergent stored is supplied to the washing body 6 in the washing part 2 through a connecting part 3. The connecting part 3 is formed on the root side of the washing part 2, and thereby the detergent-storing part 4 is removably connected to the washing part 2, and the periphery of the connecting part 3 is knurled.