A vehicle body structure has a floor panel upper; a rocker provided so as to extend in a vehicle longitudinal direction at a vehicle transverse direction outer side of the floor panel upper, and having a rocker upper and a rocker lower that are divided in a vehicle vertical direction; a floor reinforcement provided so as to extend in the vehicle longitudinal direction at a central portion between the rocker and a tunnel portion formed at a vehicle transverse direction central portion of the floor panel upper, and disposed at a vehicle rear side of a front side member; and an intermediate reinforcement lower provided so as to extend in the vehicle longitudinal direction between the rocker and the floor reinforcement, disposed at a vehicle lower side of the floor panel upper, and formed integrally with the rocker lower via a flange portion.