part by the loads u03c9 1 and u03c9 2 the detergent box 160 includes a restraining wall for restraining the degree of rotation the restraining wall 180 prevents the regulating unit 170 from being rotated at more than a predetermined angle that is when washing water is supplied from the outside and stored in the detergent storage unit 161 the regulating unit 170 is opened by the water pressure at this point the regulating unit 170 rotates counterclockwise when the regulating unit 170 rotates at more than the predetermined angle a moment is produced counterclockwise by the loads u03c9 1 and u03c9 2 produced in the regulating unit 170 due to this moment the regulating unit 170 is not able to close the opening part even after the washing water flows to the drum 122 and the tub however in the case that the restraining wall 180 is formed the regulating unit 170 restrains the angle of rotation so as not to exceed the predetermined angle that is the restraining wall 180 restrains the load portion 173 during the rotation of the regulating unit 170 so that the load u03c9 1 of the load portion 173 and the load u03c9 2 of the body portion 171 are produced at one side.