To provide a photographic processing device with which the positions of positioning pins can be regulated easily and the meandering and biasing of photosensitive materials can be prevented surely prevented.

This photographic processing device has a magazine-mounting section, to be mounted with a magazine housing the long-sized belt-like photosensitive materials wound into roll shape continuously drawable from out of an outlet and is so constituted that the magazine is mounted in the magazine- mounting section in a state of being positioned thereto, by sliding and fitting of the positioning holes or positioning recessed parts disposed at the plural points of the magazine respectively to the positioning pins disposed at the magazine mounting section. At least one of positioning pins are supported movably to an arbitrary length, in a direction where the drawing-out attitude of the photosensitive materials drawn out of the outlet of the magazine is corrected to the correct drawing-out attitude.