PURPOSE: To perform stable traveling control without causing the deflection of motion picture film by properly moving a rotation guide in accordance with the width of the motion picture film.

CONSTITUTION: When a set screw 28 is loosened, for example, a height adjusting screw 27 is rotated clockwise, the screw 27 and the screw hole 20a of a guide shaft 20 are deeply screwed, and force contracting a movable spring 25 is exerted in a film guide 1. Thus, the rotation guide 22 is moved downward along the guide shaft 20 together with a movable sleeve 21. On the contrary, when the screw 27 is rotated counterclockwise, the screw 27 and the screw hole 20a of the guide shaft 20 are shallowly screwed. Thus, the reaction of the spring 25 acts, so that the sleeve 21 is pushed up by the spring 25. Therefore, the guide 22 is moved upward along the guide shaft 20 together with the sleeve 21.