Expansion valve

The invention provides an expansion valve maintaining the functions of the prior art expansion valve and at the same time realizing a simple arrangement with less components and less required number of assembly steps, and enabling to cut down assembly costs. A first passage through which refrigerant flowing toward an evaporator travels and a second passage through which refrigerant flowing from the evaporator toward a compressor travels are formed within a valve body . In response to the temperature of the refrigerant traveling in the second passage , a valve actuating member ′ actuates a valve means disposed in the valve body to control the flow of the refrigerant entering the evaporator . A seal member sealing the area between the first and second passages and is disposed between the valve body and the valve actuating member ′. A stopper portion of the seal member is integrally formed in advance to the valve actuating member