Abstract: The invention relates to a connection device for connecting a coaxial cable (3) and a connection module or for connecting coaxial cables end-to-end, in particular for a junction block. The connection device comprises a link tube (2) having one formed end formed to receive and hold one end of a coaxial cable whose covering is stripped so as to allow electrical contact to be made between the peripheral conductor (4) of the cable and the said formed end. The link tube also contains a fixed link conducting part (10) provided with a connection head (12) for receiving and holding the stripped central conductor of the cable, thereby ensuring electrical continuity between said central conductor and the link conducting part (10). The connection module comprises a link tube having both ends provided with respective connection devices.