A polyester film includes a laminate including a plurality of first layers and a plurality of second layers alternately stacked on the plurality of first layers. Each of the first layers includes lactic acid residues, and each of the second layers includes terephthalate residues and adipic acid residues. The polyester film has an average equivalent noise level of 78 dB or less from a noise level test for film spinning the polyester film 180 degrees at 800 rpm for 30 seconds or more, and has Young's modulus of 280 kgf/mm2 or less.