JOINT STRUCTURE OF A BUMPER REINFORCEMENT AND A SIDE MEMBER

A joint structure of a bumper reinforcement and a side member, the joint structure comprising: a bumper reinforcement that is provided at a vehicle front-rear direction end portion of a vehicle so as to extend in a vehicle width direction, and that includes: a vertical wall and a pair of horizontal walls; a left and right pair of side members that are respectively provided at the vehicle inner side of the bumper reinforcement so as to extend in the vehicle front-rear direction with leading ends of the side members fastened to the vertical wall of the bumper reinforcement; and fastening extensions that are provided at the respective leading ends of the side members, that project out toward a vehicle width direction outer side with respect to a respective side member, and that are fastened to at least one of the horizontal walls of the bumper reinforcement.