To provide a washing and drying machine reducing a drying time without exhausting circulation air having high-temperature and high-humidity in drying laundry by a heat pump.

This washing and drying machine decreases the temperature of a compressor by directly cooling the compressor with water for lowering the temperature of refrigerant of a heat pump, cools operating refrigerant in the compressor and the compressor motor, increases the amount of heat of a heat sink by decreasing the temperature of a radiator and the heat sink, and eliminates exhausting the circulation air to the outside by lowering the temperature of the circulation air.