To reliably prevent a protruded portion formed on an endless belt from riding on support rollers to support the endless belt without adverse effect on the traveling of the endless belt in the endless belt supported by a plurality of support rollers in a traveling manner and a device to use the endless belt.

A surface on the side in contact with both end faces of at least a drive roller 65 is orthogonal to an inner circumferential surface 67A of an endless belt 67 at a protruded portion 67B formed on the endless belt, and the width cut at the plane orthogonal to the traveling direction of the endless belt 67 is reduced step by step as being separated from the surface in contact with the inner circumferential surface 67A of the endless belt 67. Thus, the protruded portion 67B is easily deformed, and a large force generated instantaneously between the protruded portion 67B and both end faces of the drive roller 65 can be absorbed by the deformation of the protruded portion 67B. Therefore, the protruded portion 67B of the endless belt 67 can be prevented from riding on the drive roller 65.