To prevent a lid from hitting a hanging rack or the like in case of opening while making this lid into vertical turn type, to prevent the lid from standing out and further to surely keep the lid closed in a closing state.

Since a lid 25 is made into link structure composed of rear and fore lid bodies 26 and 27 and is folded into two in case of opening, the lid is formed short and compact and in the closing state, on the other hand, the lid 25 is elongated from the state of folding into two and covers the opening part of the washing tub. In such a state, lock members 56 and 57 for lock are engaged with the side of the washing tub so that the lid can be locked. Then, the lock members 56 and 57 for lock can be operated by turning an operating member 49.