<p>This drum-type washing machine is provided with: a water tank (51); a detergent-supply device (56); a first water-supply valve (54) that supplies washing water to the detergent-supply device (56); a water-supply connection tube (60) that connects the water tank (51) to the detergent-supply device (56) and is provided with a backflow-prevention part (60a); a water-tank air-removal tube (74) that connects the water tank (51) to the detergent-supply device (56); and a control device (49) that controls wash, rinse, and spin-dry steps, at least. The detergent-supply device (56) has: a first water-supply channel (83) that takes washing water from the first water-supply valve (54); and a water-tank air-removal connection part (91) that connects to the water-tank air-removal tube (74). Said first water-supply channel (83) and water-tank air-removal connection part (91) are connected to each other.</p>
