A washing machine comprising: 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, characterized in that the water supply device comprises: a water supply connector having a first chamber and a second chamber formed therein, wherein the second chamber is formed outside the first chamber along an outer periphery of the first chamber, and wherein the first chamber and the second chamber are separated from each other by a partition wall; a first water supply hose connecting the first chamber with the first tub; a second water supply hose connecting the second chamber with the second tub; wherein the water supply connector comprises: a first hot water inflow nozzle configured to supply hot water to the first chamber; and a first cold water inflow nozzle configured to supply cold water to the first chamber; a second hot water inflow nozzle configured to supply hot water to the second chamber; and a second cold water inflow nozzle configured to supply cold water to the second chamber. 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, characterized in that the water supply device comprises: a water supply connector having a first chamber and a second chamber formed therein, wherein the second chamber is formed outside the first chamber along an outer periphery of the first chamber, and wherein the first chamber and the second chamber are separated from each other by a partition wall; a first water supply hose connecting the first chamber with the first tub; a second water supply hose connecting the second chamber with the second tub; wherein the water supply connector comprises: a first hot water inflow nozzle configured to supply hot water to the first chamber; and a first cold water inflow nozzle configured to supply cold water to the first chamber; a second hot water inflow nozzle configured to supply hot water to the second chamber; and a second cold water inflow nozzle configured to supply cold water to the second chamber. a water supply connector having a first chamber and a second chamber formed therein, wherein the second chamber is formed outside the first chamber along an outer periphery of the first chamber, and wherein the first chamber and the second chamber are separated from each other by a partition wall; a first water supply hose connecting the first chamber with the first tub; a second water supply hose connecting the second chamber with the second tub; wherein the water supply connector comprises: a first hot water inflow nozzle configured to supply hot water to the first chamber; and a first cold water inflow nozzle configured to supply cold water to the first chamber; a second hot water inflow nozzle configured to supply hot water to the second chamber; and a second cold water inflow nozzle configured to supply cold water to the second chamber. a first hot water inflow nozzle configured to supply hot water to the first chamber; and a first cold water inflow nozzle configured to supply cold water to the first chamber; a second hot water inflow nozzle configured to supply hot water to the second chamber; and a second cold water inflow nozzle configured to supply cold water to the second chamber.