Patent ID: 7299889

Claim:
A seat supporting structure in a motorcycle, comprising: projecting pieces for receiving a load are provided in sections corresponding to both ends of a seat in a rear frame so as to project upward; a bottom-plate of the seat includes: a flat portion that constitutes a center of the bottom plate in a width direction of the motorcycle and extends in a front-rear direction; movably supported plates that are formed at both ends of the bottom plate in the width direction of the motorcycle, which are sections opposed to the projecting pieces, positioned above the flat portion and movably supported by the projecting pieces; and vertical walls that connect ends of the flat portion in the width direction of the motorcycle and ends on inner sides of the motorcycle of the movably supported plates; and inner cushion materials harder than a cushion material on a seat surface side are provided on the flat portion so as to be located between both the movably supported plates and between both the vertical walls.