Laminated polyester film

A laminated polyester film comprising:

• a polyester layer A containing pigment;
• and polyester layers B1 and B2, each of layers B1 and B2 containing wax, on both sides of the polyester layer A, wherein the film satisfies formulae (I), (II) and III, a surface free energy of each layer B1 and layer B2 is not less than 27 mN/m and not more than 43 mN/mm, and a coefficient of variation of water contact angle for each layer B1 and layer B2 is not less than 0% and not more than 10%, when a contact angle with water is measured 10 times at arbitrary defined positions within 200 mm×200 mm:
• Wb1>Wa (I)
• Wb2>Wa (II)
• Wb1>Wb2 (III)
• wherein Wb1 and Wb2 represent wax content per unit area (μg/cm2) of the layer B1 and layer B2 respectively, Wa represents wax content per unit area (μg/cm2) of the layer A,), Wb1 is not less than 6 μg/cm2 and not more than 20 μg/cm2, Wb2 is not less than 4 μg/cm2 and not more than 10 μg/cm2, and the coefficient of variation of water contact value represents a value obtained by dividing the standard deviation in values measured 10 times by the average value.