To prevent any shock sound to be generated in stopping a pump via a check valve from occurring, by providing a flow rate variable pump for circulating detergent and a controller to control the pump so as to reduce gradually the flow rate at stopping the pump.

This dry cleaner transmits a control signal to the inverter control circuit so that after turning OFF the main power supply switch, the pump's revolution frequency is gradually lowered to reach zero about 10 seconds later. As the revolution frequency goes down, then, the pump's suction/discharge ability is gradually reduced to lower the detergent amount to be sucked up from the detergent vessel. This gradually weakens the force of pushing up the valve body 181 of the check valve 18 from the bottom to reduce a size of opening the valve body 181. Upon weakening the force of pushing up the valve body from the bottom down to a certain level, the valve boy 181 comes down to a position likely to get a contact with the valve seat 183 to shut off the detergent flow. The check 18 can thus be closed gradually.