A metal sheet laminating resin film is provided which is composed of a polyester resin having such a mechanical property that a true stress at which a true strain of 1.0 as measured at 45° C. is obtained is 13 to 40 MPa. In addition, a metal sheet laminating resin film is provided in which the polyester resin is a material obtained by blending 20 to 80 mass % of a polytrimethylene terephthalate resin into a polybutylene terephthalate resin or a two-layer resin film of a polyester resin and a polyethylene terephthalate resin, wherein the thickness of the polyester resin layer is not less than one half the total resin layer thickness.
