A clothes treatment apparatus includes a first chamber for accommodating clothes, a second chamber under the first chamber, a blowing fan for suctioning air from the first chamber, a heat pump for compressing a refrigerant for heat exchange with the air suctioned by the blowing fan and discharging the heat-exchanged air to the first chamber, a steamer for generating and supplying steam, a water supply tank for supplying water to the steamer, a water drain tank for storing condensed water generated in the first chamber and the heat pump, a hanger bar positioned in the first chamber and configured to hold the clothes in the first chamber. The apparatus further includes a motor, a vibrating body for vibrating alternately in opposite rotation directions, and a motion converter for rotating together with the vibrating body and converting the vibration of the vibrating body to allow the hanger bar to reciprocate.