A structure for mounting a front fender that can enhance rigidity of a fin without unduly increasing the thickness of the fin or decreasing the slope of the fin. In one example structure for mounting a front fender, a fin of a front fender is mounted on a fin mounting portion formed in a front fork with a bolt, and a holding member is fastened to the fin mounting portion, together with the fin 55, with the bolt. A tip portion of the holding member is extended to a position separate from the fin mounting portion to support the reverse surface of the fin.