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 for filtering air in the circulation channel (53, 81), wherein the filter cartridge comprises: an inside filter cartridge with at least one mesh and an inside filter frame for fixing the at least one mesh, for filtering air discharged from the drum; and an outside filter cartridge 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, the outside filter cartridge comprising a front filter with a front mesh for filtering air that passes through the inside filter cartridge and flows forward, a rear filter with a rear mesh for filtering air that passes through the inside filter cartridge and flows rearward, and a lateral filter with a side mesh for filtering air that passes through the inside filter cartridge and flows in a lateral direction, wherein the outside filter cartridge comprises an outside filter frame for fixing the front, rear and side meshes. 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 for filtering air in the circulation channel (53, 81), wherein the filter cartridge comprises: an inside filter cartridge with at least one mesh and an inside filter frame for fixing the at least one mesh, for filtering air discharged from the drum; and an outside filter cartridge 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, the outside filter cartridge comprising a front filter with a front mesh for filtering air that passes through the inside filter cartridge and flows forward, a rear filter with a rear mesh for filtering air that passes through the inside filter cartridge and flows rearward, and a lateral filter with a side mesh for filtering air that passes through the inside filter cartridge and flows in a lateral direction, wherein the outside filter cartridge comprises an outside filter frame for fixing the front, rear and side meshes. an inside filter cartridge with at least one mesh and an inside filter frame for fixing the at least one mesh, for filtering air discharged from the drum; and an outside filter cartridge 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, the outside filter cartridge comprising a front filter with a front mesh for filtering air that passes through the inside filter cartridge and flows forward, a rear filter with a rear mesh for filtering air that passes through the inside filter cartridge and flows rearward, and a lateral filter with a side mesh for filtering air that passes through the inside filter cartridge and flows in a lateral direction, wherein the outside filter cartridge comprises an outside filter frame for fixing the front, rear and side meshes.