Disclosed herein is a washing machine having a plurality of washing spaces. A washing machine includes a first housing having a first laundry loading port formed at a front portion, a first tub disposed in the first housing, a second housing having a second laundry loading port formed at a top portion of the second housing, the second housing being disposed on the first housing, a second tub disposed in the second housing, a water supply device connectable to an external water source to supply water to the first tub and the second tub, the water supply device being installable to the second housing. The water supply device includes a water supply connector having a plurality of chambers formed therein, a first water supply hose connecting the water supply connector with the first tub and a second water supply hose connecting the water supply connector with the second tub.