As absorption instrument 10 of this invention, as it is connected to liquid supply section 20, in basic end side ahead opening the outer tube is provided inside 36 which possesses the end 37 and this outer tube 36, is connected to shade pressure occurrence section 26 in basic end side, ahead opening including with the absorption tube 38 which, possesses the end 39 it is constituted, annular liquid supply road 40 being formed with the inside perimeter aspect of outer tube, 36 and the peripheral aspect of absorption tube 38 ahead opening of absorption tube 38 the end 39 ahead opening of outer tube 36 from the end 37 being located on basic edge side featureWith it does.本発明の吸引器具10は、基端部側において液体供給部20に接続されるとともに開口先端部37を有する外管36と、この外管36内に設けられ、基端部側において陰圧発生部26に接続されるとともに開口先端部39を有する吸引管38とを含んで構成され、外管36の内周面と吸引管38の外周面との間に環状の液体供給路40が形成され、吸引管38の開口先端部39を外管36の開口先端部37より基端側に位置させてあることを特徴とする。
