Patent ID: 8579747

Claim:
A transmission belt, comprising: a stacked ring formed by stacking a plurality of elastically deformable ring materials together; and a plurality of elements arranged in a ring shape and linked together by the stacked ring, wherein when “n” represents the number of ring materials that are stacked together, surfaces of the ring materials of a first layer as an innermost layer to a predetermined m th layer, where “m” is any one of integers ranging from a value 1 to a value n−1, are subjected to a surface treatment for applying a residual compressive stress so that the residual compressive stress in the ring materials of the first layer to the predetermined m th layer is higher than that in the ring material of an (m+1) th layer, and each of the ring materials of the first layer to the m th layer is formed so as to have an outer circumferential length longer than an inner circumferential length of a ring material that is located adjacent and outward of the corresponding each of the ring materials, such that an inner peripheral surface of the ring material that is located adjacent and outward of the corresponding each of the ring materials is in contact with an outer peripheral surface of the each of the ring materials.