A first male member (110) and a tubular part (30) are in communication with each other via first through third holes (21-23). The gas channel (212) and the liquid channel (211) of a second male member (210) are in communication with the tubular part. First through third channels (41-43) are formed in a faucet (40). The faucet can switch between a first rotation position that causes the first channel to place the first hole and a tubular syringe connecting part (32) in communication with each other, and a second rotation position that causes the first channel to place the liquid channel and the syringe connecting part in communication with each other. When the faucet is at the second rotation position, the second hole and the gas channel are in communication with each other via the second channel, and the first male member and the inner cavity (45) of the faucet are in communication with each other via the third hole and the third channel. A first hydrophobic filter (50a) is provided to a channel that links the first male member and the gas channel when the faucet is at the second rotation position, and a second hydrophobic filter (50b) is provided to a channel that links the first male member and a faucet-connected gas feed member (410) when the faucet is at the second rotation position.La présente invention concerne un premier élément mâle (110) et une partie tubulaire (30) en communication lun avec lautre via un à trois trous (21-23). Le canal de gaz (212) et le canal de liquide (211) dun second élément mâle (210) sont en communication avec ladite partie tubulaire. Un à trois canaux (41-43) forment un robinet (40). Ledit robinet est apte à passer dune première position ‑ entraînant le premier canal à placer le premier trou et une partie de raccordement de seringue tubulaire (32) en communication lun avec lautre ‑ à une seconde position de rotation, entraînant le premier canal à placer le canal de liquide et la partie de raccordement de seringue en communication lu
