Provided are a white
polyester film including a
polyester and white particles, in which, at an equivalent of a thickness of 250 μm, a
machine stretching direction tear strength FMD is 2.5 to 6.0 N, a transverse stretching direction tear strength FTD is 2.0 to 5.0 N, a ratio of the
machine stretching direction tear strength FMD to the transverse stretching direction tear strength FTD is 1.05 to 4.00, and a concentration of terminal carboxyl groups is 5 to 25 equivalents /
ton, a method for manufacturing the same, a
solar cell back sheet and a
solar cell module in which the same white
polyester film is used.