Abstract: A connecting device for establishing stable electrical connections for interconnecting at least two conductors, this device ensuring both the conduction between the conductors and the mechanical assembly. The device comprises a terminal element having a tubular guide in which there is engaged one of the conductors an adjacent sleeve which receives the bared end of this conductor after it has been folded 180.degree., and a tongue of conductive material which partly penetrates the sleeves of at least two contiguous connecting terminal elements so as to achieve the electrical junction between the conductors carried by said terminal elements. The tongue comprises at least one retaining point which co-operates with a complementary cavity located in the sleeve, whereby the tongue which achieves the electrical conduction also ensures the locking of the conductors by a simple clipping in the connecting terminal elements.