PROBLEM TO BE SOLVED: To provide a male connector which can suppress liquid leakage when the male connector is not connected, and also can suppress lowering of durability of a structure suppressing the liquid leakage and to provide a connection device of an infusion line equipped with the male connector.SOLUTION: The male connector 200 includes: a movable stumpfe N 10 in which a liquid is allowed to flow and a shoulder part 12 protruding radially outward is formed at a specified position in a radial direction an outer cylindrical body 20 formed outside of the movable stumpfe N 10 and formed to have the same axis as that of the movable stumpfe N 10 a hole 22a of a bottom 22 for holding the movable stumpfe N 10 movably in the axial direction and a valve 50 which is positioned to close the inlet side of the flow passage of the movable stumpfe N 10 and opens by being pressed when the movable stumpfe N 10 moves to the back end side in the axial direction. When the movable stumpfe N 10 is inserted to the male connector 200, the movable stumpfe N 10 moves to the back end side in the axial direction and the valve 50 opens. Then, the shoulder 12 becomes contact with a connection acceptor in the state in which the inlet side of the flow passage of the movable stumpfe N 10 is opened.COPYRIGHT: (C)2012,JPO&INPIT【課題】雌コネクターに接続されていないときの液漏れを抑制でき、この液漏れを抑制する構造の耐久力の低下を抑制できる雄コネクター及びこの雄コネクターを備えた輸液ラインの接続装置を得る。【解決手段】液体の流通が可能であって、軸方向所定位置には径方向外側に突出する肩部12が形成された可動鈍針10と、可動鈍針10と同軸に可動鈍針10の外側に形成された外筒体20と、可動鈍針10を軸方向に移動可能に保持する底部22の穴22aと、可動鈍針10の流路入口側を塞ぐように設置され、可動鈍針10が軸方向後端側に移動したときに押圧されて開口する弁50と、を備え、雌コネクター200に可動鈍針10を挿入すると可動鈍針10が軸方向後端側に移動して弁50を開口させ、可動鈍針10の流路入口側が開通した状態において肩部12が接続相手先に当接している。【選択図】図5
