The present disclosure provides a clothing treatment apparatus comprising: a cabinet having an injection hole in one surface thereof; a door rotatably coupled to the cabinet to open/close the injection hole; a first chamber which is located in the cabinet and receives clothing through the injection hole; a first tank which is located in the lower part of the first chamber and stores water; a second tank which is located on one side surface of the first tank in the lower part of the first chamber, and stores condensate water generated in the first chamber; and a hanger unit which is located in the first chamber to hold the clothing. The hanger unit includes: a hanger body assembly unit provided in the width direction of the first chamber; extended body units extending toward the bottom surface of the first chamber between opposite ends of the hanger body assembly unit; and a clothing holding unit which is located at the side surface of each of the extended body units and holds the clothing.