FIELD: medicine drug packages. SUBSTANCE: connecting device has supporting member mounted on receptacle, sleeve defining inner opening and piston positioned for sliding in inner opening between first position of detachment from receptacle plug and second feeding position, wherein hollow needle built into piston is urged to puncture said plug. Supporting member has at least one flexible protrusion for holding piston in feeding position, protrusion extending inward from sleeve to opening for engagement with outer radial piston leg. Connecting device of such construction is used for mixing of separate medicine components. EFFECT: increased efficiency in locking of piston in feeding position during solving of preparation and producing of medicine drug in liquid form. 11 cl, 5 dwg
