The present disclosure relates to a laundry treating apparatus including a cabinet having a laundry inlet defined therein, a tub including a tub body disposed inside the cabinet to store water, and a tub inlet defined in the tub body and in communication with the laundry inlet, a drum rotatably disposed inside the tub to store laundry, an air supply including a chamber body disposed inside the cabinet, chamber disposed in the chamber body, a chamber supply flow channel guiding air inside the tub body to the chamber, and a tub supply flow channel guiding air inside the chamber to the tub body, a heat exchanger assembly that sequentially performs dehumidification and heating of air introduced into the chamber, and a washer that forms a ring-shaped water stream sprayed onto an inner circumferential surface of the chamber supply flow channel to remove foreign substances from the chamber supply flow channel.