A modular element for an electrical power distribution network of an aircraft comprises a section of a bus comprising connection points at different locations distributed along its length. The bus section comprises interconnection points making it possible to link the modular element to other modular elements arranged longitudinally in series with the modular element. Electrical conductors of the bus section are housed in an enclosure corresponding to a structural part of the aircraft. This enclosure comprises openings facing the connection points of the bus section, so as to allow the connection of at least one electrical equipment item of the aircraft to the bus section by means of a local electrical link.