For optimizing a body structure for a passenger car in the area of the vehicle occupant compartment and of the rollover bar device arranged behind the occupant seats, specifically with respect to a high stability under load, low weight and economical manufacturing, a wall structure of the vehicle occupant compartment extending adjacent to the vehicle occupant seats and the rollover bar device consisting of a high-strength non-metallic material, such as a fiber-reinforced plastic material, e.g., CKF, and being constructionally inseparably combined.