PURPOSE: To make a photographic material feedable to an exposure part without using an exclusive magazine, by installing a cassette position adjusting device, which makes variously sized simple cassettes appliable, in an image output unit such as a computerized phototypesetting machine, a former, etc.

CONSTITUTION: When a photographic material is fed to an exposure part, a cassette position adjusting device 20 is used, and a photographic material drawing port 11 of a simple cassette 10 is made so as to come close to the vicinity of a pinch part 9 of feed rollers 4 and 4' of an image output unit 1. And, this port is set up in a magazine housing part 3, and a photographic material 13 rolled on a core 12 is fed to the exposure part from the drawing port 11 of the cassette 10 by these rollers 4 and 4'. In this cassette position adjusting device 20, there are provided with a cassette mount and a cassette locking member, and furthermore at least one of a height adjusting member, a depth directional position adjusting member and a cross directional position adjusting member is installed there.