<p>An expansion valve having a tubular member (15) for receiving a low-pressure refrigerant (14) sent from an evaporator (13) and also having a tube member (16) inserted in the tubular member (15) and receiving a high-pressure refrigerant sent from a condenser (12). The expansion valve has a valve mechanism (17) provided in the tube member (16). An end wall (18) is formed at one end (15a) of the tubular member (15), and the end wall (18) has a low-pressure inflow hole (19) for allowing the refrigerant (14) sent from the evaporator (13) to flow into the tubular member (15) and a high-pressure outflow hole (20) for allowing the refrigerant (14) to flow out from the tube member (16) into the evaporator (13). A lid member (28) is detachably attached to the other end (15b) of the tubular member (15), and the lid member (28) has a low-pressure outflow hole (35) for allowing the refrigerant (14) to flow out from the inside of the tubular member (15) and a high-pressure inflow hole (36) for allowing the refrigerant (14) sent from the condenser (12) to flow into the tube member (16) inserted in the tubular member (15).</p>
