A washing and drying machine includes a washing tub for accommodating laundry, an outer tub holding the washing tub rotatably, a housing for elastically supporting the outer tub, a water feeder four supplying wash water to the outer tub, a heater for heating air in the outer tub, an air circulation duct for circulating the air in the outer tub via the heater, a blower for circulating the air in the air circulation duct, and an electrostatic atomizer placed in the air circulation duct for supplying electrostatically atomized particles into the washing tub and the outer tub.