Transmission V-belt and manufacturing method therefor

A power transmission V-belt having a cross section orthogonal to a belt circumferential direction being a V shape, and having a frictional power transmission surface on each side in a belt width direction,

• wherein the power transmission V-belt comprises:
• a rubber layer formed of a rubber composition;
• a cord buried in the rubber layer along the belt circumferential direction;
• and
• at least one reinforcing layer buried in the rubber layer,
• wherein the reinforcing layer comprises a large number of reinforcing fiber filaments having the same length as a belt width;
• and contains no fibers that intersect with the belt width direction, or contains the fibers that intersect with the belt width direction in a weight per unit area of 30% or less of the reinforcing fiber filaments,
• wherein the reinforcing layer has a structure in which the reinforcing fiber filaments are in a non-twisted state, are oriented in the belt width direction, and are spread and bonded in a sheet shape, and
• wherein the reinforcing layer has a thickness of 0.05 mm to 0.5 mm.