Abstract: A drum-type washer/dryer having an evaporator (34) for performing dehumidification by cooling air drawn from the inner space of a drum (24) and also having condenser (35) for heating the air dehumidified by the evaporator (34), wherein the air heated by the condenser (35) is made to sequentially pass through a duct (40) and a blowhole (47) and blown as dry air to clothes in the drum (24). A backflow preventing portion (52) is provided in the duct (40), and when bubbles flow back into the duct (40) from the inner space of the drum (24) through the blowhole (47), the backflow preventing portion (52) functions as resistance for preventing the back flow of the bubbles.