PROBLEM TO BE SOLVED: To provide a flow path connecting device that prevents an opening state of a switching cock from being changed.SOLUTION: A flow path connecting device 30 comprises: a tube 31 having a first flow path in which intracavitary fluid flows and a male lure connector 32. The male lure connector 32 has an axial direction through hole 32h serving as a second flow path communicating with the first flow path with the tube 31 connected thereto, and is provided with a male lure part 34 and a protrusive member 35. The male lure part 34 is formed in a tapered shape that tapers toward a tip end, and capable of airtightly abutting with an inner surface wall of a taper hole 23h communicating with a discharge hole 21 arranged at a female lure part 23r of a discharge tube connection part 23 being a female lure connector that forms a port and through which the intracavitary fluid passes. The protrusive member 35 is provided in a forward protruding manner than a tip end surface of the male lure part 34, and has an outer peripheral surface parallel with a through hole 25h of a rotation cock and an outer diameter formed to be smaller than an inner diameter of a flow path in the discharge tube connection part 23.COPYRIGHT: (C)2015,JPO&INPIT【課題】切替コックの開通状態が変更されることを防止する流路接続装置を提供する。【解決手段】流路接続装置30は、腔内の流体が流れる第1の流路を有するチューブ31と、チューブ31が取り付けられて第1の流路と連通する第2の流路である軸方向貫通孔32hを有し、先端側に向かうにつれて先細りとなるテーパー形状に形成され、ポートを構成する雌ルアーコネクタである排気チューブ連結部23の雌ルアー部23rに設けられて腔内の流体が通過する排気孔21に連通するテーパー孔23hの内面壁に対して気密に当接可能な雄ルアー部34及び雄ルアー部34の先端面よりも前方に突出して設けられ、外周面が回転コック25の貫通孔25hに対して平行な面を有する、外径が排気チューブ連結部23内の流路の内径よりも小さく形成されている突状部材35を設けた雄ルアーコネクタ32と、を具備する。【選択図】図4
