PURPOSE: To provide a printing processing method and device for efficiently printing the images different in size formed on a roll of developed photographic film.

CONSTITUTION: The image forming mode of the image formed on a developed color negative film 1 is detected by a detector 71, and a negative mask 61 and a lens are changed over/driven in accordance with whether the mode is a normal mode or a panoramic mode. After the image is transferred/formed on a color paper in the normal mode, the negative mask 61 and the lens are changed over so as to be adaptable to the panoramic mode and the carrying direction of the negative film 1 is changed from A to B. Thus, printing processing from a photographic film to a photographic printing paper is efficiently executed, and moreover, the wearing of the device can be reduced.