To effectively suppress the vibration of a drum in a drum type washing machine composed by supporting a rotary drum to house laundry rotatably around a horizontal axis.

On the outer peripheral surface of the rotary drum 1, plural blades 2 to generate lift in the direction of separating from a drum rotary shaft accompanying the rotation of the rotary drum 1 are arrayed with fixed pitches in a peripheral direction and attached so as to be able to change respective elevation angles. Shape memory alloy supporting bodies 3 to be deformed by receiving heat for changing the elevation angle of the blades 2 in a lift increasing direction are connected to the respective blades 2. At a position facing the outer peripheral surface of the rotary drum 1, a heater 4 for generating the heat towards a peripheral surface area on a side opposite to the eccentric position of the laundry housed in the rotary drum 1 is disposed.