Scent supply apparatus and washing/drying machine having the same

Provided are a scent supply apparatus (100) and a washing/drying machine including the same. The scent supply apparatus of a washing/drying machine including a tub (21) in a casing (11), and a guide duct (48) carrying air into the tub, is detachably installed at one side of the guide duct and supplies a scent into the tub. Because the scent supply apparatus is installed in the guide duct, the scent may be forcibly supplied into the washing/drying machine by the air being introduced into the tub from the guide duct. Accordingly, the scent may be actively supplied into the washing/drying machine, without depending only on its own diffusion, thereby improving scent supply efficiency. Also, when the scent source is exhausted and there is a need for replenishment thereof, a user may easily perform the replenishment of a scent source.