TWI704043B

The present invention provides a resin molding apparatus and a manufacturing method of a resin molded article. The generation of molding defects due to the positioning of a resin molded object is suppressed. The resin molding apparatus comprises: a molding die having a first top mold and a second bottom mold disposed opposite to each other; a supply device for supplying a preformed substrate, which is the resin molded object, on a mold surface; positioning devices for positioning the preformed substrate on guide members before molding; a mold clamping device for clamping the molding die; lightemitting elements for emitting irradiation light; first light receiving elements provided in the supply device and capable of receiving irradiation light; and a determination part for determining thepositioning of the substrate before molding. The top mold is provided with first exit holes for passing the irradiation light from the light emitting elements. The determination part determines whether or not the substrate be