PURPOSE: To smoothly wind film on the outside of a disk and to feed it on the inside of the disk even though the size of the disk is not made large by using a tapered roller and moving the film on the disk toward the center.

CONSTITUTION: The endless film 8 fed to a projector 22 is arranged on the front surface side of the rotatable disk 1. By forming a through hole on the disk 1, the tapered roller 10 is rotatably provided on the rear surface side of the disk 1. The roller 10 is arranged so that the large-diameter end of the roller 10 may turn to the inner part of the disk 1 and the small-diameter end thereof may turn to the outer part, and one part of the roller 10 is projected to the front surface side of the disk 1 through the through hole and comes in contact with the film 8. Namely, circumferential speed on the large-diameter end side of the roller 10 is higher than the circumferential speed on the small- diameter end side of the roller 10, so that the film 8 on the disk 1 is fed little by little toward the center by as much as a difference between the circumferential speed of the large-diameter end and that of the small-diameter end of the roller 10, and simultaneously the film is prevented from being excessively wound to each other.