< Topic >The catheter whose it is possible to improve operating efficiency, is offered even with when it possesses the window part.SolutionsCatheter 1 of this invention is interposed into the coelom, the sheath inside 2 which has the window part 26 which transmits the inspection wave and aforementioned sheath 2 it is movement possible in axial direction of particular sheath 2 and the sensing station the inside of 41 which detects the aforementioned inspection wave and aforementioned window part 26 or it is possible, features that it possesses the additional strength tube 4 which is movement to cover the outside, possible and, to axial direction of aforementioned sheath 2.< Choice figure >Drawing 1【課題】窓部を有する場合でも、作業性を向上させることが可能なカテーテルを提供する。【解決手段】本発明のカテーテル1は、体腔内に挿入され、検査波を透過する窓部26を備えたシース2と、前記シース2内を当該シース2の軸方向に移動可能であり前記検査波を検出する検出部41と、前記窓部26の内面または外面を覆うことができ、前記シース2の軸方向へ移動可能である補強チューブ4と、を有することを特徴とする。【選択図】図1
