A clothes dryer comprising: a rotatable drum; a drum supporter for supporting the drum, the drum supporter being provided with a discharge port for discharging air from the drum; a circulation channel (53, 81) for guiding air discharged through the discharge port into the drum; and a filter cartridge disposed in the circulation channel (53, 81) for filtering air, wherein the filter cartridge comprises: an inside filter cartridge for filtering air discharged from the drum; and an outside filter cartridge for filtering air that has passed through the inside filter cartridge, the outside filter cartridge being disposed in the circulation channel (53, 81) in a state of being supported by the drum supporter, the inside filter cartridge being separably received in the outside filter cartridge through an opening formed in a top surface of the outside filter cartridge, characterized in that the inside filter cartridge is provided with an interference protrusion, and the outside filter cartridge is provided with a restraint protrusion for restraining the interference protrusion such that the outside filter cartridge is moved simultaneously with the inside filter cartridge when the inside filter cartridge is pulled in a direction in which the inside filter cartridge is withdrawn through the opening in a state in which the outside filter cartridge is supported by the drum supporter, and in that the interference protrusion and the restraint protrusion are spaced apart from each other in a direction in which the inside filter cartridge is moved such that the inside filter cartridge is movable within the outside filter cartridge. a rotatable drum; a drum supporter for supporting the drum, the drum supporter being provided with a discharge port for discharging air from the drum; a circulation channel (53, 81) for guiding air discharged through the discharge port into the drum; and a filter cartridge disposed in the circulation channel (53, 81) for filtering air, wherein the filter cartridge comprises: an inside filter cartridge for filtering air discharged from the drum; and an outside filter cartridge for filtering air that has passed through the inside filter cartridge, the outside filter cartridge being disposed in the circulation channel (53, 81) in a state of being supported by the drum supporter, the inside filter cartridge being separably received in the outside filter cartridge through an opening formed in a top surface of the outside filter cartridge, characterized in that the inside filter cartridge is provided with an interference protrusion, and the outside filter cartridge is provided with a restraint protrusion for restraining the interference protrusion such that the outside filter cartridge is moved simultaneously with the inside filter cartridge when the inside filter cartridge is pulled in a direction in which the inside filter cartridge is withdrawn through the opening in a state in which the outside filter cartridge is supported by the drum supporter, and in that the interference protrusion and the restraint protrusion are spaced apart from each other in a direction in which the inside filter cartridge is moved such that the inside filter cartridge is movable within the outside filter cartridge. an inside filter cartridge for filtering air discharged from the drum; and an outside filter cartridge for filtering air that has passed through the inside filter cartridge, the outside filter cartridge being disposed in the circulation channel (53, 81) in a state of being supported by the drum supporter, the inside filter cartridge being separably received in the outside filter cartridge through an opening formed in a top surface of the outside filter cartridge, characterized in that the inside filter cartridge is provided with an interference protrusion, and the outside filter cartridge is provided with a restraint protrusion for restraining the interference protrusion such that the outside filter cartridge is moved simultaneously with the inside filter cartridge when the inside filter cartridge is pulled in a direction in which the inside filter cartridge is withdrawn through the opening in a state in which the outside filter cartridge is supported by the drum supporter, and in that the interference protrusion and the restraint protrusion are spaced apart from each other in a direction in which the inside filter cartridge is moved such that the inside filter cartridge is movable within the outside filter cartridge.