| abstract |
To provide a layered polyester film having excellent mechanical properties, transparency, heat resistance, and gas barrier property. A layered polyester film including a polyester film and a thin film layer, wherein the polyester film is a biaxially oriented polyester film including a dicarboxylic acid component containing mainly a furandicarboxylic acid and a glycol component containing mainly ethylene glycol, the covering layer is formed on at least one surface of the polyester film, and the layered polyester film has a plane orientation coefficient P of not less than 0.005 and not more than 0.200, and a thickness of the layered polyester film is not thinner than 1 µm and not thicker than 300 µm. |