The invention relates to a fixing and/or reinforcing part (6) linking an anchoring means of a safety belt (4) to a quarter lining (2) of a vehicle.

This body shell structure (3) comprises a wheel arch (4), a quarter light lining (5) and at least one lateral component (6, 8) formed of a pressed steel sheet and arranged in the passenger compartment.

The wheel arch (4) comprises a flat connecting part (4.1), the quarterpanel lining (5) comprises a connecting portion (5.1) and the lateral component (6, 8) comprises a connecting element (6.1; 8.1).