To prevent air for drying from being cooled unnecessarily by making the rotating direction of a cooled air blowing fan possible to be switched to forward or backward, reducing the amount of the air at the time of the backward rotation of this blowing fan lower than that at the time of the forward rotation and backward rotate-operating the blowing fan at the initial and final period of drying operation.

After a door 19 is opened and closed after putting matters to be dried in a rotary drum 2, a drying course is selected by a drying course switching switch and the intensity of a heat source 3 is selected by a heater switching switch to operates a starting switch. Then, drying operation is started and a heat source 3 and a motor 5 are energized by the instruction of a controller at this time to rotate a rotary drum 2 and a both wing fan 8. Thereafter, when prescribed drying finish is detected, the energizing to the source 3 is stopped to execute blow-operate for cooling clothing. At the time of drying operation, the motor 5 is slowly rotated backward in the initial and final periods of operation to reduce a cooling air amt. and to suppress the thermal exchange amt. at the fan 8.