The invention relates to a vehicle body structure in the floor region of the occupant compartment having on both sides a respective longitudinal beam (3) in the floor region of the occupant compartment between a transmission tunnel and a side sill. According to the invention each longitudinal beam (3) extends longitudinally continuously over the entire footwell length from the front end (4) to a heel plate. The longitudinal beam (3) is here formed on the bottom side as a closed longitudinal hollow beam by virtue of a longitudinal beam stepped edge (9) of the floor panel (10AB) and on the top side as a longitudinal beam closure part (11SW) by virtue of a longitudinal beam angle section connected to the top side.