A wall-mounted washing machine includes a tub and a drying device. The drying device includes a fan coupled to the tub, a hot air supply duct coupled to the fan and configured to guide air propelled from the fan into the tub, a drying heater disposed inside the hot air supply duct and configured to heat the air introduced into the hot air supply duct, and a hot air discharge duct coupled to the tub and configured to guide the air passing through the tub toward the fan to cool and dehumidify the air passing through the tub. The fan is configured to draw air from the hot air discharge duct and to supply the air back to the hot air supply duct.
