A device connecting a recipient closed by a perforatable stopper and a container for a needle, comprising a base for mounting the container, the base defining a central bore and comprising means for mounting on the recipient, the needle pertaining to a subset engaged in the central bore forming part of the device, for mounting on the container, and being arranged in the central bore parallel to the bore's longitudinal axis, and a sealing sleeve arranged in the central bore, around the needle and in contact therewith, the base being a single component and comprising a body for perforating the stopper extending from an intermediate wall of the base, away from the central bore and parallel to its central axis, up to a distal end, the perforating body being hollow and the inner space thereof communicating with the central bore and with a space radially surrounding its distal end.