Method for manufacturing diagonally stretched film including a diagonally stretching process, a trimming process and a film receiving process

The issue of the present invention is a thin film that does not break during and after the trimming process. The thin film has excellent cut surface quality, high productivity and stable production, and is capable of suppressing uneven display. The solution is a method for manufacturing a diagonally stretched film, which includes: a diagonally stretching process, which uses a pair of grippers to grip two ends of the film in the width direction, such that one of the grippers moves first and the other gripper moves relatively late to transport the film and diagonally stretch the film in the width direction; a trimming process, which trims the end portion of the diagonally stretched film after stretched by the stretching process; and a film receiving process, which receives the trimmed leading-side end portion on the leading-side, the trimmed delay-side end portion on the delay-side, and a non-trimmed area. The manufacturing method is characterized in that the receiving tension of the leading-side end portion is