Aircraft including: - a fuselage including an opening and consisting of a skin and beams (110a-b) fixed to an interior face of the skin, where each beam (110a-b) is interrupted at one of its ends at an edge of the opening and where for each beam (110a-b) that is interrupted at an edge of the opening another beam (110a-b) is aligned with said beam (110a-b) and interrupted at the opposite edge of the opening, - a removable panel including a skin and beams (120a-b) fixed to an interior face of the skin, where for each pair of aligned beams (110a-b) of the fuselage interrupted at the opening a beam (120a-b) of the removable panel extends between the two beams (110a-b) of the pair and each end of the beam (120a-b) of the removable panel faces an end of a beam (110a-b) of the pair, and - at the end of at least one beam (110a-b) of the fuselage facing an end of a beam (120a-b) of the removable panel, fixing means assuring removable fixing between the end of said beam (110a-b) of the fuselage and the end of said beam (120a-b) of the removable panel characterized in that the fixing means include: - a male fitting that includes a shoe fixed to the end of the beam (120a-b) of the removable panel and a male element fastened to the shoe that includes a base surface and three lateral surfaces (508b-d) that all extend from the base surface in the same direction and in different planes, - a female fitting that includes a shoe fixed to the end of the beam (110a-b) of the fuselage and a receptacle fastened to the shoe and in which the male element is accommodated and that includes a base surface bearing against the base surface of the male fittings and for each lateral surface (508b-d) of the male element a lateral surface (408b-d) faces said lateral surface (508b-d) of the male element, - for each lateral surface (508b-d) of the male element a bearing system that is fastened to the lateral surface (408b-d) of the receptacle corresponding to the lateral surface (508b-d) of the male element, where the bearing system includes a bearing surface and an adjustment system adapted to move said bearing surface and to immobilise it in position, and - a bolt that includes an externally threaded shank and a nut fastened to the female fitting, where each base surface (408a, 508a) includes a bore (412, 512) for the passage of the externally threaded shank and where the bolt sandwiches the two base surfaces (408a, 508a). - a fuselage including an opening and consisting of a skin and beams (110a-b) fixed to an interior face of the skin, where each beam (110a-b) is interrupted at one of its ends at an edge of the opening and where for each beam (110a-b) that is interrupted at an edge of the opening another beam (110a-b) is aligned with said beam (110a-b) and interrupted at the opposite edge of the opening, - a removable panel including a skin and beams (120a-b) fixed to an interior face of the skin, where for each pair of aligned beams (110a-b) of the fuselage interrupted at the opening a beam (120a-b) of the removable panel extends between the two beams (110a-b) of the pair and each end of the beam (120a-b) of the removable panel faces an end of a beam (110a-b) of the pair, and - at the end of at least one beam (110a-b) of the fuselage facing an end of a beam (120a-b) of the removable panel, fixing means assuring removable fixing between the end of said beam (110a-b) of the fuselage and the end of said beam (120a-b) of the removable panel - a male fitting that includes a shoe fixed to the end of the beam (120a-b) of the removable panel and a male element fastened to the shoe that includes a base surface and three lateral surfaces (508b-d) that all extend from the base surface in the same direction and in different planes, - a female fitting that includes a shoe fixed to the end of the beam (110a-b) of the fuselage and a receptacle fastened to the shoe and in which the male element is accommodated and that includes a base surface bearing against the base surface of the male fittings and for each lateral surface (508b-d) of the male element a lateral surface (408b-d) faces said lateral surface (508b-d) of the male element, - for each lateral surface (508b-d) of the male element a bearing system that is fastened to the lateral surface (408b-d) of the receptacle corresponding to the lateral surface (508b-d) of the male element, where the bearing system includes a bearing surface and an adjustment system adapted to move said bearing surface and to immobilise it in position, and - a bolt that includes an externally threaded shank and a nut fastened to the female fitting, where each base surface (408a, 508a) includes a bore (412, 512) for the passage of the externally threaded shank and where the bolt sandwiches the two base surfaces (408a, 508a).