A noncircular sheet feed roller includes a core and a rubber belt mounted on the core. The core includes a peripheral member having a peripheral surface which is arcuate about a center axis thereof, and a pair of support ribs which are provided opposite from the arcuate peripheral surface of the peripheral member to be spaced from the peripheral member by a space and extend parallel to the center axis symmetrically with respect to the center axis. The rubber belt is a looped belt which has a predetermined width as measured along the center axis and has an inner peripheral surface and an outer peripheral surface. The peripheral member is inserted in the rubber belt, and a portion of the rubber belt is fitted in the space between the peripheral member and the support ribs.