PURPOSE: To manufacture uniform and high quality molded item by a structure wherein a filmy heat generating body, which is provided over the wall surface contacting with the molding material in a molding tool, and a heating means to heat the filmy heat generating body.

CONSTITUTION: A molding tool consists of a mold main body 1 and a cover 2, both of which are made of insulating material and on the respective inner surfaces of which thin film layers 4 made of electrically-conductive material are formed. By passing high frequency electric current through a heating coil 5 in the periphery of the molding tool, eddy current is generated in the thin film layers 4 so as to generate heat. As a result, a molded item 3 is formed faithful to the shape of the inner surface of the molding tool. Thus, the temperature of the molded item 3 can be raised without heating the whole molding tool, the heat capacity of which is large. In addition, any temperature can be controlled by controlling the high frequency current applied to the heating coil 5. Accordingly, the saving of power consumption is obtained and at the same time the optimum temperature to molding material can be given by controlling temperature.