To provide a laminated polyester film having a laminated structure of three or more layers, which can reduce retardation of the whole film and can secure productivity in a slit process.SOLUTION: A laminated polyester film has at least three layers of an intermediate layer containing a polyester copolymer as a main component resin and two surface layers containing a polyester polymer as a main component resin, in which intrinsic viscosity of at least one surface layer is 0.70-1.20 dl/g.SELECTED DRAWING: None
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