LAMINATED POLYESTER FILM

[Problem] A polyester film which exhibits good base coverage property and good scratch resistance during deep-drawing molding when attached with a metal sheet to form a laminated metal sheet, and shows a good yield and good processing suitability when used as a light-blocking tape. [Solution] A laminated polyester film comprising a pigment-containing polyester layer A and wax-containing polyester layers B1 and B2 on both sides of the polyester layer A, wherein the film satisfies the following formulas (I) and (II), and the 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 the contact angle with water is measured 10 times at arbitrary defined positions within the range of 200mm x 200mm: Wb 1 > Wa Wb 2 > Wa (wherein Wb1 and Wb2 represent the wax content per unit area of the layer B1 and layer B2 respectively, and Wa represents the wax content per unit area of the layer A, and wherein the coefficient of variation represents a value obtained by dividing the standard deviation in values measured 10 times by the average value.)