The invention relates to a resin molding process of charging a thermoplastic resin (3) into a cavity (21) of a rubber-made mold (2) and cooling the resin (3) to form a molding and a resin molding apparatus (1). In charging the thermoplastic resin (3) into the cavity (21), an electromagnetic wave generator (4) is used and the thermoplastic resin (3) is heated selectively against the mold (2) by irradiating the resin (3) with an electromagnetic wave having an intensity peak within the wavelength region of 0.78 to 2[mu]m from the outside of the mold (2). ABS resin, which is a noncrystalline and rubber-modified thermoplastic resin, is used as the thermoplastic resin (3).