A laundry treating machine comprising: - an air supply unit for supplying air; - a tub for having the air supplied thereto from the air supply unit to treat the laundry, the tub having an air recovery opening formed in an outside circumferential surface thereof for recovery of the air to the air supply unit; - a lint filter mounted to an inside of the air recovery opening extended along an inside circumferential surface of the tub for filtering the lint from the air; and - a filter cleaning unit, including a cleaning water line for supplying the cleaning water and a distribution nozzle unit for spraying the cleaning water being supplied from the cleaning water line, for spraying cleaning water from the inside of the air recovery opening toward an inside of the tub and from an upper side of the lint filter to separate the lint from the lint filter, wherein the air supply unit is positioned on an upper side of the tub for supplying the air to a front of the tub and includes: - a fan positioned over the air recovery opening for moving the air; - a heating duct for heating the air being moved by the fan; and - an air discharge hole for supplying the air heated at the heating duct to a front of the tub, so that the air is circulated through the air recovery opening and supplied to the front of the tub, characterized in that the distribution nozzle unit includes: - a fastening portion connected to the cleaning water line fastened to the air recovery opening detachably, - an extension coupled to the fastening portion to extend toward the inside of the air recovery opening, and - a nozzle portion branched from the extension for spraying the cleaning water to the lint filter, wherein the extension is extended to a position having a largest width of the air recovery opening, and the nozzle portion has first and second nozzle portions extended from an end portion of the extension toward width directions of the air recovery opening, and the first and second nozzle portions (219a, 219b) include a plurality of nozzles for spraying the cleaning water to a tangential direction of the lint filter. - an air supply unit for supplying air; - a tub for having the air supplied thereto from the air supply unit to treat the laundry, the tub having an air recovery opening formed in an outside circumferential surface thereof for recovery of the air to the air supply unit; - a lint filter mounted to an inside of the air recovery opening extended along an inside circumferential surface of the tub for filtering the lint from the air; and - a filter cleaning unit, including a cleaning water line for supplying the cleaning water and a distribution nozzle unit for spraying the cleaning water being supplied from the cleaning water line, for spraying cleaning water from the inside of the air recovery opening toward an inside of the tub and from an upper side of the lint filter to separate the lint from the lint filter, - a fan positioned over the air recovery opening for moving the air; - a heating duct for heating the air being moved by the fan; and - an air discharge hole for supplying the air heated at the heating duct to a front of the tub, so that the air is circulated through the air recovery opening and supplied to the front of the tub, - a fastening portion connected to the cleaning water line fastened to the air recovery opening detachably, - an extension coupled to the fastening portion to extend toward the inside of the air recovery opening, and - a nozzle portion branched from the extension for spraying the cleaning water to the lint filter,