LOWER VEHICLE-BODY STRUCTURE OF VEHICLE

PROBLEM TO BE SOLVED: To provide a lower vehicle-body structure of a vehicle for restraining an intrusion quantity to the cabin side of a center pillar upper part, by securing an inward deformation margin in the vehicle width direction of a center pillar lower part by deflective deformation of a side sill, by absorbing a shock by deforming an upper part of a side sill reinforcement by deformation promoting parts, by restraining intrusion of the side sill by deforming so as to deflect the side sill without breaking the side sill to a side collision load by a reinforcing member arranged in a lower corner part of the side sill reinforcement. SOLUTION: The reinforcing member 51 for restraining deformation of a corner part 8a is arranged in the lower corner part 8a on the outside in the vehicle width direction of the side sill reinforcement 8, and the reinforcing member 51 is arranged so as to extend in the longitudinal direction by including a center pillar joining part of the side sill 6, and the deformation promoting parts 52 and 53 for promoting deformation of an upper part of the side sill reinforcement 8, are arranged in an upper position corresponding to the center pillar joining part of the side sill reinforcement 8. COPYRIGHT: (C)2011,JPO&INPIT