Provided is a laminated polyester film for release that is excellent in recycling properties and surface smoothness. An easily soluble resin layer is provided on one surface of a polyester film, the easily soluble resin layer contains a polyester component, the polyester component contains, as an acid component, (A) terephthalic acid, (B) a dicarboxylic acid having a sulfonate group, and (C) another dicarboxylic acid, wherein the surface of the easily soluble resin layer has an arithmetic average roughness RA1 of 30 nm or less and a maximum protrusion height RP1 of 150 nm or less, A release laminated polyester film. None
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