Abstract: The invention provides a molding apparatus capable of obtaining a reference mark utilizing characteristics of molding of a polarizing film in the course of molding the polarizing film, and adapted for large items small scale production of the polarizing film. The molding apparatus is made up of a molding box which is opened at an upper face, a closing valve attached to a suction port communicating with an inner space of the molding box, a vacuum source connected to the closing valve, pressing means provided at an opening edge of the molding box, and a mold having a concave spherical molding face and installed in the molding box, allowing the polarizing film to be sucked onto the molding face by vacuum suction to mold a colored concave and convex polarizing film.