Abstract: A device used to facilitate the making of the connection system of an optical fiber comprises: an upright that supports the gripping of the joining piece associated with holding the connectors in an immobile state with respect to the joining piece during the front polymerization of the connection system; this upright also supporting a fastening system used to hold the connector in an immobile state during the rear polymerization of the connection system and an adjuster capable of causing the pivoting and translation of the joining piece so that it surrounds the solder point located in the rear of the connector, held in an immobile state by the fastening system, to achieve the rear polymerization of the connection system. The device is very useful especially in the field of telecommunications by optical fibers.