To provide a film which uses a polyester resin that is recycled from PET bottles, which has high lamination strength, and which has little uneveness in thickness. A polyester film that contains 50 wt.%-95 wt.% of a polyester resin recycled from PET bottles, wherein the content of an isophthalic acid component is 0.5 mol.%-5.0 mol.% relative to the total content of dicarboxylic acid components in the total polyester resins that constitute the polyester film, and the polyester film has a specified intrinsic viscosity, thermal shrinkage rate, refractive index in the thickness direction and uneveness in thickness.