Interconnection system for a rack of a system of an aircraft, the interconnection system comprising: - at least one shelf (200, 300) comprising at least one frame (201, 202, 203), each frame being adapted to receive an electronic device, each frame comprising a connector (204, 205, 206) allowing, on a first side, a connection of said electronic device, and, on a second side, a connection to the system of the aircraft, - a so-called rear panel, consisting of a printed circuit, the rear panel comprising: • as many coupling fittings as connectors of the shelf, each coupling fitting being connected to a second side of a corresponding connector, • at least one interface for connecting a so-called lateral panel, - the so-called lateral panel, consisting of an electronic circuit board, the lateral panel comprising: • at least one interface for connecting the so-called rear panel, • a plurality of connectors allowing a connection to the system of the aircraft, the printed circuit of the rear panel allowing a set of predefined electrical links between the connectors and the interface, the electronic circuit board of the lateral panel allowing a set of electrical links to be set up between the interface and the connectors to the system of the aircraft, the interconnection system being characterized in that: - each second side of each connector of the shelf comprises a flexible part intended to come to bear on a coupling fitting of the rear panel, each flexible part comprising integrated electrical links, - each coupling fitting of the rear panel comprising a plurality of electrical contacts, and each second side of the connectors coming to bear flexibly on a coupling fitting of the rear panel when the rear panel is securely fixed to the shelf. - at least one shelf (200, 300) comprising at least one frame (201, 202, 203), each frame being adapted to receive an electronic device, each frame comprising a connector (204, 205, 206) allowing, on a first side, a connection of said electronic device, and, on a second side, a connection to the system of the aircraft, - a so-called rear panel, consisting of a printed circuit, the rear panel comprising: • as many coupling fittings as connectors of the shelf, each coupling fitting being connected to a second side of a corresponding connector, • at least one interface for connecting a so-called lateral panel, • as many coupling fittings as connectors of the shelf, each coupling fitting being connected to a second side of a corresponding connector, • at least one interface for connecting a so-called lateral panel, - the so-called lateral panel, consisting of an electronic circuit board, the lateral panel comprising: • at least one interface for connecting the so-called rear panel, • a plurality of connectors allowing a connection to the system of the aircraft, the printed circuit of the rear panel allowing a set of predefined electrical links between the connectors and the interface, the electronic circuit board of the lateral panel allowing a set of electrical links to be set up between the interface and the connectors to the system of the aircraft, the interconnection system being characterized in that: - each second side of each connector of the shelf comprises a flexible part intended to come to bear on a coupling fitting of the rear panel, each flexible part comprising integrated electrical links, - each coupling fitting of the rear panel comprising a plurality of electrical contacts, and each second side of the connectors coming to bear flexibly on a coupling fitting of the rear panel when the rear panel is securely fixed to the shelf. • at least one interface for connecting the so-called rear panel, • a plurality of connectors allowing a connection to the system of the aircraft, - each second side of each connector of the shelf comprises a flexible part intended to come to bear on a coupling fitting of the rear panel, each flexible part comprising integrated electrical links, - each coupling fitting of the rear panel comprising a plurality of electrical contacts, and each second side of the connectors coming to bear flexibly on a coupling fitting of the rear panel when the rear panel is securely fixed to the shelf.