The invention relates to an electrical distributor (1) which can be mounted on a pre-fabricated wall (45), comprising connections (3) on one side (5) of the distributor (1) and other connections (9) on the other side of the distributor (1). Each contact (3) is electrically connected to at least one other contact (9) on the other side (7). Both sides (7, 5) are mounted in relation to each other in such a way that they are arranged on both sides of the distributor after assembly. According to the invention, the distributor can be fixed to a pre-fabricated wall in a relatively simple and therefore economical manner if each contact is connected to one other contact, if at least one common conductor (35) is physically placed between both sides (5, 7) of the distributor (1), if said conductor is located between the pre-fabricated wall and the other side (7) once the distributor has been mounted on the pre-fabricated wall, if the additional connections (10) are connected to at least one common conductor (35) and if said connections are arranged near to a further connection (9) on the other side of the distributor (1), forming a pair of connections (13) therewith, and if the connections (9, 10) of said pair of connections (13) form contact elements for outlets (15) respectively accommodating at least one bipolar plug (25).