The present invention car be to prevent the hunting phenomenon of the air conditioning thermal expansion valve which equipment or the like, the valve body 50 of the thermal expansion valve, and the valve chamber 54, a valve body 120, a high-pressure toward the evaporator and controls the flow rate of the refrigerant. Returning the refrigerant from the evaporator is brought into contact with the passage 63 when passing through the temperature sensing and pressure transmitting member 100, and at the same time passed the temperature, passing the refrigerant pressure towards the power drive unit (80). The temperature of the pipe-sensing and pressure transmitting member is in accordance with the position of the diaphragm 82 of the power drive unit (80) by biasing the valve element 120 to regulate the flow rate of the high-pressure refrigerant. In the temperature sensing and pressure transmitting member 100, the resin tube 140 is inserted, and the heat ballast member 40 within the tube 140 is filled.