A vehicle framework structure comprising: a floor panel; a tunnel disposed centrally, in a vehicle width direction, in the floor panel, so as to extend in a vehicle front-rear direction; a rocker disposed on an outer side, in the vehicle width direction, of the floor panel, so as to extend in the vehicle front-rear direction; a floor lower cross member forming a first closed section portion with a bottom face of the floor panel, the floor lower cross member being disposed along the vehicle width direction; a floor beam forming a second closed section portion with the bottom face of the floor panel, the floor beam being disposed between the rocker and the tunnel along the vehicle front-rear direction, a front end, in the vehicle front-rear direction, of the floor beam being configured to be connected to a front side member provided in a vehicle front part so as to be disposed, in the vehicle width direction, between the rocker and the tunnel and to extend along the vehicle front-rear direction, and a rear end, in the vehicle front-rear direction, of the floor beam being connected to the rocker and to the floor lower cross member; and a rear side member configured to be disposed on an outer side, in the vehicle width direction, of a vehicle rear part, the rear side member forming a third closed section portion with a bottom face of the floor panel and extending in the vehicle front-rear direction, wherein a front part, in the vehicle front-rear direction, of the rear side member and a rear part, in the vehicle front-rear direction, of the floor beam are placed at the same level in the vehicle width direction, characterized in that inside the first closed section portion of the floor lower cross member, a reinforcing member is provided between the rear part, in the vehicle front-rear direction, of the floor beam and the front part, in the vehicle front-rear direction, of the rear side member. a floor panel; a tunnel disposed centrally, in a vehicle width direction, in the floor panel, so as to extend in a vehicle front-rear direction; a rocker disposed on an outer side, in the vehicle width direction, of the floor panel, so as to extend in the vehicle front-rear direction; a floor lower cross member forming a first closed section portion with a bottom face of the floor panel, the floor lower cross member being disposed along the vehicle width direction; a floor beam forming a second closed section portion with the bottom face of the floor panel, the floor beam being disposed between the rocker and the tunnel along the vehicle front-rear direction, a front end, in the vehicle front-rear direction, of the floor beam being configured to be connected to a front side member provided in a vehicle front part so as to be disposed, in the vehicle width direction, between the rocker and the tunnel and to extend along the vehicle front-rear direction, and a rear end, in the vehicle front-rear direction, of the floor beam being connected to the rocker and to the floor lower cross member; and a rear side member configured to be disposed on an outer side, in the vehicle width direction, of a vehicle rear part, the rear side member forming a third closed section portion with a bottom face of the floor panel and extending in the vehicle front-rear direction, wherein a front part, in the vehicle front-rear direction, of the rear side member and a rear part, in the vehicle front-rear direction, of the floor beam are placed at the same level in the vehicle width direction, characterized in that inside the first closed section portion of the floor lower cross member, a reinforcing member is provided between the rear part, in the vehicle front-rear direction, of the floor beam and the front part, in the vehicle front-rear direction, of the rear side member.