To provide a polyester film for a front sheet of a solar battery which has hydrolysis resistance and excels in transparency.

The laminated polyester film for the front sheet of the solar battery is a polyester film which consists of at least three layers of two outermost layers containing particles and a central layer not containing the particles substantially, contains a magnesium element of 9-40 ppm, a titanium element and an element of phosphorus, and has a terminal carboxyl group amount of 26 equivalent/t or below and an intrinsic viscosity of 0.65 dl/g or above.