A drying device in 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 from the fan into the tub, a drying heater disposed inside the hot air supply duct and configured to heat air introduced into the hot air supply duct, and a hot air discharge duct coupled to the tub and configured to guide air flowing from the tub toward the fan as well as dehumidify the air. The hot air discharge duct includes a first duct formation member disposed on an outer circumferential surface of the tub and a second duct formation member fused to the first duct formation member. The first duct formation member and the second duct formation member include fused surfaces formed on the same plane.
