To provide a skin insert injection molding method advantageous for controlling the generation of warp on a laminate.

A laminate formed of a skin material 1 integrated with a base 4 is manufactured by using the skin material 1 formed into the given shape by shaping and injection molding a resin material forming the base 4 on the surface of the skin material 1 in the state of disposing the skin material 1 on a cavity of a molding tool 3. The mold shrinkage amount of the skin material 1 is made to almost correspond to the mold shrinkage amount of the base 4 at the time of injection molding to control the generation of warp of the laminate. The laminate can be used for instrument panels for vehicles.