To solve the problem that a motor tends to be at high temperature since the cooling mechanism of a conventional drying air blowing fan motor is an air-cooled type with insufficient cooling ability.

The drying function part of a washing and drying machine 1 incorporates a heat pump device 5. Air circulating in a circulation air duct 4 is dehumidified and heated by the endoergic part 6 and exoergic part 8 of the heat pump device 5. Thus, clothes 2 stored in a treatment tub 3 is dried. A fan 13 for circulating the air in the circulation air duct 4 is rotated by the fan motor 14. A cooling medium at low temperature is made to flow in the cooling medium pipe 10a of the heat pump device 5. A part of the cooling medium pipe 10a is wound around the circumference of the fan motor 4. The fan motor 14 is efficiently cooled by the cooling medium flowing in the cooling medium pipe 10a.