Abstract: An apparatus used for radiotherapeutic purposes, designed to store a number of radioactive-source carriers and to facilitate their selective ejection via respective sheaths to remote applicators designed to contact anatomical parts to be treated, comprises a cylindrical body inside a metallic enclosure, the body being formed with a plurality of axially extending cylindrical cavities each adapted to accommodate a source carrier. Certain of these cavities, referred to as active, are open at both ends and are connected via respective conduits with associated entrance and exit connectors on the outer surface of the enclosure, the exit connectors being engageable by the ejection sheaths.