Connection of stiffening frames between an aircraft fuselage and a wing box

The structure has a rib (3) extending a fuselage and provided for a wing box. An upper panel (5) of the box is connected to the fuselage and the rib. Stiffening frames (14) of the fuselage are respectively extended in transverse sections of an aircraft. The frames extend continuously via notches in the panel and include lower ends that stiffen the rib. The notches are oriented toward the sections to allow passage of cores (16) of the frames. Notch heels are oriented in an axial direction of the aircraft to free passage for base plates (18) of the frames on the fuselage and the rib.