Disclosed is a connecting module (1) which is to be used in telecommunication and data technology and comprises a housing (2), electric contacts for connecting wires and/or cables, and at least one fastening element (7) that allows the connecting module (1) to be fixed to an assembly frame. Said fastening element (7) is embodied at least in two parts, encompassing a first fastening piece (8) and a second fastening piece (9). The connecting module (1) can be put on the assembly frame by means of the first fastening piece (8) and can be locked on the assembly frame with the aid of the second fastening piece (9).