PROBLEM TO BE SOLVED: To provide a valve member for needleless connectors having excellent opening/closing endurance as the valve, and a needleless connector.SOLUTION: A valve member 5A for needleless connectors includes a flat-plate or cylindrical silicone rubber substrate, and a thermoplastic polyurethane sheet laid on the silicone rubber substrate, and has a slit 8 penetrating in the thickness direction. A needleless connector 1 comprises: a needleless connector tube 4 that includes connecting ports 11-13 capable of connecting tubular bodies, a flow passage 14 for communicating the connecting ports 11-13, and a valve member storage part 15 disposed near the connecting port 13 and the valve member 5A for the needleless connector stored in the valve member storage part 15.COPYRIGHT: (C)2015,JPO&INPIT【課題】弁としての開閉耐久性に優れたニードルレスコネクタ用弁部材及びニードルレスコネクタを提供する。【解決手段】平板状又は筒状のシリコーンゴム基体と、シリコーンゴム基体に敷設された熱可塑性ポリウレタンシートとを備え、厚さ方向に貫通するスリット8を有するニードルレスコネクタ用弁部材5A、並びに、管体を接続可能な接続口11~13、これら接続口11~13を連通する流路14及び接続口13の近傍に配置された弁部材収納部15を有するニードルレスコネクタ管4と、弁部材収納部15に収納されたニードルレスコネクタ用弁部材5Aとを備えたニードルレスコネクタ1。【選択図】図1