VEHICLE REAR PART STRUCTURE

There is provided a vehicle rear part structure. A rear floor panel forms a floor surface of a rear part of a vehicle and has a front end portion extending in a width direction of the vehicle and an inclined surface inclined upwardly from both ends of the front end portion in the width direction of the vehicle towards a rear side of the vehicle. A main floor panel is coupled to the front end portion of the rear floor panel, the main floor panel forming a floor surface of the vehicle. A pair of side members are arranged along side ends of the rear floor panel and the main floor panel, the pair of side members extending in a longitudinal direction of the vehicle. A cross member bridges between the pair of side members below a boundary of the rear floor panel and the main floor panel and extending in the width direction of the vehicle. Each of the side members includes a lower surface, an outer wall surface extending upwardly at a vehicle outer side of the lower surface, and an inner wall surface extending upwardly at a vehicle inner side of the lower surface. The cross member includes both end portions fixed to the outer wall surfaces of the side members across the inner wall surfaces of the side members, a horizontal part extending along the main floor panel, and an inclined part extending along the inclined surface of the rear floor panel. A ridge line extending up to the both end portions is formed between the horizontal part and the inclined part.