Abstract: A connecting section for optical fiber cables which has multicore connectors respectively mounted simultaneously on a plurality of optical fiber core wires led from the end of the cable sheath of one optical fiber cable and on a plurality of optical fiber core wires led from the end of the cable sheath of the other optical fiber cable, housings respectively projected toward the ends of the cable sheaths and mounted on the outer peripheral surfaces of the ends of the cable sheaths for containing the optical fiber core wires with the multicore connectors and a spring for applying a force for butting the optical fiber core wires to the multicore connectors to hold the connectors in the ends of the housings so that the connecting ends of the multicore connectors are opposed in such a manner that the optical fiber core wires are simultaneously optically connected and that the housings are connected through an adapter formed over the outer peripheral surfaces of the ends thereof and fittings for securing the outer