Disclosed is the high sealing performance sealed easily transition to the open state, and to restore migration source of the sealed connector, and to provide a connector for a valve body used in the connector. A small-diameter portion 31 having a protrusion 33 projecting from the annular seal portion 32 and a top surface which projects in a ring in the vicinity of one end, as well as large, which is provided continuously to the other end of the small diameter portion 31 the actual head 21A in that it has a diameter 41, between the spokes shaped support legs 42a and radial multiple spokes shaped support legs 42a and the adjacent extending to a substantially horizontal direction at intervals in the circumferential direction from the large-diameter portion 41 head support portion 22A and the connector valve body 5A having a having a plurality of voids 43a which is disposed, as well as the vicinity of the flow path 14 and the first connection port 11 to connection port 11 to 13, these communicating the connector tube 4 having a valve body holding portion 15 which is arranged, is housed in the valve body holding section 15, at least part of a first positioned in the connecting port 11 a the connector valve body 5A of the small-diameter portion 41 connector 1 with the door. [Selection Figure] Figure 6【課題】シール性の高い密閉状態から開放状態に容易に移行し、かつ元の密閉状態に復元移行するコネクタ、及び、このコネクタに用いられるコネクタ用弁体を提供すること。【解決手段】一端部近傍に環状に突設された環状シール部32及び頂面に突設された突条33を有する小径部31、並びに、小径部31の他端部に連設された大径部41を有する中実頭部21Aと、大径部41から周方向に間隔をあけて略水平方向に放射状に延在する複数の輻状支持脚42a及び隣接する輻状支持脚42aの間に配置された複数の空隙部43aを有する頭部支持部22Aとを備えたコネクタ用弁体5A、並びに、接続口11~13、これらを連通する流路14及び第1の接続口11の近傍に配置された弁体保持部15を有するコネクタ管4と、弁体保持部15に収納され、小径部41の少なくとも一部が第1の接続口11内に配置された前記コネクタ用弁体5Aとを備えたコネクタ1。【選択図】 図6
