A clothes dryer comprising: a clothes dryer body having a heater therein; a drying chamber rotatably provided in said body; a dual side bladed fan of heat exchange type having in the outer portion a group of rotating grooves; and a partition member having an opening of which the inner surface is opposed to the outer surface of said dual side bladed fan, for separating paths of said heated air and said cooling air together with said dual side bladed fan in said body; said partition member having in the inner portion a group of fixed grooves engaged with said rotating grooves in labyrinth; said fixed grooves having a rising portion rising up to said heated air path on the base portion; said rising portion having a hole through which said fixed grooves are connected with said heated air path at the end in a direction of air flow.
