A liquid resin material stored in a resin material cup is sent to a supply tank under pressure through a primary side supply pipe by increasing the pressure in a pressure tank. The supply tank is provided with a piston that is displaced in accordance with the amount of the resin material in the supply tank, and the resin material is quantified by the stroke of the piston. The quantified resin material is sent to a heating member through an evaporation side supply pipe, is evaporated by heating, and condenses on a substrate. The resin material is quantified by filling the supply tank with the resin material temporarily, and only the filling resin material is sent to the heating member. Therefore, an evaporation amount becomes constant, and as a result, the thickness of a resin thin film is stabilized.