<p>A drum washing machine is provided with a water tank for housing a washing tub that is tilted downward towards the rear surface side, a vibration detection unit for detecting the vibration of the water tank, and a torque variation detection unit for detecting the magnitude of the torque variation of a drive unit for driving the washing tub. A control unit (11a) for controlling each step such as wash, rinse, and drain detects the fabric quality of the laundry from the magnitude of the torque variation while the drive unit is operated at a rotational speed in which the magnitude of the vibration detected by means of the vibration detection unit (16) reaches the maximum.</p>
