A laminate comprising: a base material; an undercoat layer that is formed on at least a portion of an outer surface of the base material, the undercoat layer containing an organic polymer having functional groups, the undercoat layer being formed into a membrane shape or a film shape; and an atomic layer deposition film that contains a precursor that serves as a starting material, the atomic layer deposition film being formed so as to cover a surface of the undercoat layer, at least some of the precursor in the atomic layer deposition film being bonded with the functional groups, wherein the linear expansion coefficient of a layered film including the base material and the undercoat layer is 1.0×10 -5 /K or higher and 8.0×10 -5 /K or lower, and the organic polymer of the undercoat layer is selected from the group consisting of polyether sulfone, polyimide, polyamide-imide, polyetherimide, polyetheretherketone and polysulfone, the linear expansion coefficient of the layered film being measured using thermomechanical analysis of the layered film cut to a size of 4 mm in width × 15 mm in length, with the proviso that a laminate prepared and characterized as follows is excluded: A heat-resistant PET film having a thickness of 100 μm is used as a base material, and oxygen plasma treatment with an output power of 300 W and a treatment time of 180 s is performed on the plain surface thereof. Thereafter, polyimide varnish is coated onto the heat-resistant PET surface having undergone the oxygen plasma treatment by using a wire bar, followed by drying for 30 minutes at 200°C, thereby forming an undercoat layer of a polyimide resin having a thickness of 1 μm. Subsequently, an Al 2 O 3 film of 10 nm is formed on the undercoat layer by means of atomic layer deposition. At this time, plasma treatment is not performed on the undercoat layer. The laminate thus obtained has a Water Vapor Transmission Rate, WVTR, of 1.0×10 -3 g/m 2 /day and a peeling strength of 6.5 N/10 mm, with the peeling strength being measured according to the peeling test described in paragraph of EP 2 737 996 A1. a base material; an undercoat layer that is formed on at least a portion of an outer surface of the base material, the undercoat layer containing an organic polymer having functional groups, the undercoat layer being formed into a membrane shape or a film shape; and an atomic layer deposition film that contains a precursor that serves as a starting material, the atomic layer deposition film being formed so as to cover a surface of the undercoat layer, at least some of the precursor in the atomic layer deposition film being bonded with the functional groups, wherein the linear expansion coefficient of a layered film including the base material and the undercoat layer is 1.0×10 -5 /K or higher and 8.0×10 -5 /K or lower, and the organic polymer of the undercoat layer is selected from the group consisting of polyether sulfone, polyimide, polyamide-imide, polyetherimide, polyetheretherketone and polysulfone, the linear expansion coefficient of the layered film being measured using thermomechanical analysis of the layered film cut to a size of 4 mm in width × 15 mm in length, with the proviso that a laminate prepared and characterized as follows is excluded: A heat-resistant PET film having a thickness of 100 μm is used as a base material, and oxygen plasma treatment with an output power of 300 W and a treatment time of 180 s is performed on the plain surface thereof. Thereafter, polyimide varnish is coated onto the heat-resistant PET surface having undergone the oxygen plasma treatment by using a wire bar, followed by drying for 30 minutes at 200°C, thereby forming an undercoat layer of a polyimide resin having a thickness of 1 μm. Subsequently, an Al 2 O 3 film of 10 nm is formed on the undercoat layer by means of atomic layer deposition. At this time, plasma treatment is not performed on the undercoat layer. The laminate thus obtained has a Water Vapor Transmission Rate, WVTR, of 1.0×10 -3 g/m 2 /day and a peeling strength of 6.5 N/10 mm, with the peeling strength being measured according to the peeling test described in paragraph of EP 2 737 996 A1.