To obtain a film where printing can be performed by securely detecting the position of a frame even when a latent image is previously formed and where a black part does not appear at a film end when the latent image is developed by making the length in the feeding direction of a 1st latent image part shorter than the length in a long-side direction of a frame to be exposed and providing a 2nd latent image part between the 1st latent image parts.

The length in the feeding direction of the 1st latent image part F1b is made shorter than the length in the long-side direction of the frame F1a to be exposed so that the 1st latent image part F1b may be arranged exactly corresponding to the frame F1a. Then, the 2nd latent image part F1c is provided between two 1st latent image parts F1b. The density of the latent image of the 2nd latent image part F1c is gradually lowered from both ends toward the center and becomes almost zero in a central area. A density difference of ≥10% is secured between an area where the density is gradually lowered and an area where the density becomes almost zero. Since the density difference between the 1st and the 2nd latent image parts F1b and F1c is small on the film F1, the black part is not caused at both ends of the 1st latent image part F1b at the time of printing.