The endoscope connector of the present invention, the inlet of the fluid delivery device is connected, a discharge port for discharging the fluid flowing from said inlet, and a tubular having a flow passage connecting the inlet and the discharge port and parts, open at the outer periphery of the cylindrical portion, holding a detection hole communicating with the flow path, by the mouthpiece engage the endoscope, the discharge port at a position opposite to the opening portion of the mouthpiece a holding portion which is disposed on the outer periphery of the tubular portion, a biasing member which expands and contracts in a direction along the flow path, disposed on the outer periphery of the cylindrical portion, wherein in conjunction with the biasing member advance and retreat between a first position and a second position along the flow path, when the holding portion is not engaged with the spinneret, the detection hole by the urging force of the urging member located in a first position to open, in a case where the holding portion is engaged with the cap, the endoscope Outer surface in contact with the containing the obstruction or narrowing cover the detection holes are moved to the second position closer to said inlet than said first position.本発明の内視鏡接続具は、流体送出装置が接続される流入口、前記流入口から流入した流体を吐出する吐出口、および前記流入口及び前記吐出口を接続する流路を有する筒状部と、前記筒状部の外周において開口し、前記流路に連通する検出孔と、内視鏡の口金と係合することにより、前記吐出口を前記口金の開口部と対向する位置に保持する保持部と、前記筒状部の外周に配設され、前記流路に沿う方向に伸縮する付勢部材と、前記筒状部の外周に配設され、前記付勢部材に連動して前記流路に沿った第1の位置と第2の位置との間で進退移動し、前記保持部が前記口金に係合していない場合には、前記付勢部材の付勢力によって前記検出孔を開放する第1の位置に位置し、前記保持部が前記口金と係合している場合においては、前記内視鏡の外表面と当接して前記第1の位置よりも前記流入口に近い第2の位置に移動して前記検出孔を閉塞又は狭めるカバー部と、を含む。
