A clothes treatment apparatus is disclosed. The clothes treatment apparatus includes, a case (10) defining therein a treatment chamber (12) for accommodating clothes, a steam unit (40) for supplying steam to the treatment chamber (12), a blower unit (30) for drawing air from the treatment chamber (12), an inlet temperature sensor (39) for measuring an inlet temperature, which is a temperature of air drawn into the blower unit (30), a heat pump unit (50) for heating air drawn by the blower unit (30) to supply the heated air into the treatment chamber (12), and a control unit (60) for controlling the steam unit (40), the blower unit (30) and the heat pump unit (50), wherein the control unit (60) controls operation of the heat pump unit (50) based on a preheated inlet temperature T1, which is measured by the inlet temperature sensor (39) when starting operation of the blower unit (30) while preheating the steam unit (40) without operating the heat pump unit (50).