Aircraft fuselage element

An aircraft fuselage element, in which the fuselage element is in one piece and has a longitudinal axis, comprising:

• a closed wall defining an internal space, an external surface of the closed wall forming an external skin of a fuselage,
• the closed wall having a cross section along the longitudinal axis comprising, on an internal-space side, a flat median part which is parallel to the longitudinal axis, a male connecting element at a first end of the flat median part and which has a thickness greater than a thickness of the flat median part, and a female connecting element at an other end of the flat median part, the connecting elements being positioned projecting in the internal space, each of the connecting elements configured to cooperate with a corresponding respective connecting element of another fuselage element positioned edge-to-edge with the fuselage element with a view to interlocking these fuselage elements longitudinally with each other, the female connecting element including a staggering of the closed wall in relation to the flat median part, and the male connecting element is configured to be accommodated at least partially in an other staggering having a form of the staggering of the female connecting element, and
• one of the connecting elements comprises a step forming a frame for the fuselage, at least a part of the one of the connecting elements being located between the step and the flat median part.