A clothes dryer of the present invention includes: a casing having an inner space, and a ventilation part for allowing the inner space to communicate with an external space; a drum disposed in the casing on a circulation flow path where an air flow circulates; a heat pump, which has a compressor for circulating a refrigerant along a refrigerant pipe, absorbs heat from air discharged from the drum during circulation of the refrigerant, and by using the absorbed heat, heats air to be supplied into the drum along the circulation flow path; a cooling fan, which is disposed in the casing, and cools the compressor by introducing outside air into the casing through the ventilation part; and a sound-insulating cover connected with the casing, wherein the sound-insulating cover is spaced apart from the ventilation part so that the outside air is introduced into the casing through the ventilation part, and has a sound-insulating plate which is disposed to overlap with at least a portion of the ventilation part when viewed from a front of the ventilation part.