Abstract: Disclosed is a brassiere washing case having a laundry protective case protecting a laundry and being prevented from separation or breakage. The present invention includes a laundry protective case accommodating and protecting a laundry such as a brassiere therein and allowing washing water to flow therein and flow out thereof. The laundry protective case includes a first body in the shape of a container having a first opening provided to one side thereof and a second body having a second opening detachably coupled to the first opening, the second body and the first body couples to each other and defining a laundry accommodating space, wherein a rim of the first opening comprises an outer sidewall portion supporting an outer side of the second opening and an inner sidewall portion supporting an inner side of the second opening.