To provide a furandicarboxylate unit-containing polyester film usable for industrial and packaging purposes. The film of the present invention is a polyester film, which is a biaxially oriented film of a polyester resin including a dicarboxylic acid component containing mainly a furandicarboxylic acid and a glycol component containing mainly ethylene glycol, wherein the film has a plane orientation coefficient ΔP of not less than 0.005 and not more than 0.200 and a film thickness of not thinner than 1 micro meter and not thicker than 300 micro meters.