To provide a two-layer molding in which a thin surface layer which forms a design surface and is excellent in appearance and a back layer formed from a recycled material are molded integrally.

With the use of a mold for injection molding in which a design surface side inner surface is coated with an insulating layer at least 10 μm in thickness made of a heat resistant resin 0.01 cal/cm.sec.°C or below in heat conductivity, after a back layer resin is injected into the mold, the mold is opened slightly, and a surface resin is injected between the mold and the back layer resin for molding.