Patent ID: 8337347

Claim:
A driving belt, comprising: a plurality of elements interlinked annularly to situate a recess on an outer circumferential side, the recess including an upper face; two rows of endless rings parallel to each other in the recess of the elements, the rings including an inner circumferential face configured to fit onto the upper face of the recess; protruding portions that hold the rings to prevent detachment of the rings from the recess, which protrude from an outer circumferential side of inner walls of the recess toward a width center of each element so a maximum clearance between end faces of the protruding portions is narrower than a total width of the rings; and a guide face is a flat inclined face on at least one of the end faces of the protruding portions that produces an inward component of a pushing force that pushes one of the rings into the recess, wherein a distance between the inclined face of and an end face an opposite protruding portion becomes wider continuously toward an inner circumferential side.