A device for mounting an exhaust gas reflux valve and preventing a valve disc of an exhaust gas reflux valve which opens and closes an exhaust gas reflux passage in an engine and a stepping motor which drivingly and controlingly opens and closes the valve from being overheated by high temperature heat of an exhaust gas, wherein the valve body (201) of the exhaust gas reflux valve is embedded in that portion of an engine structure (100) where temperature is lower than exhaust gas temperatures. Thus the engine structure can absorb and spread high-temperature heat of the exhaust gas for radiation, and so it is possible to prevent overheating of the stepping motor (300) due to high-temperature heat of the exhaust gas without the need of any special water-cooled construction such as a cooling water chamber.
