PROBLEM TO BE SOLVED: To provide a catheter capable of preventing a drive shaft from being remained in a pulled back state in a catheter body, and preventing a defect such as a kink or the like from occurring at the catheter body.SOLUTION: The catheter 1 includes a catheter body 2 provided with a window portion 26 through which an inspection wave passes, a drive shaft provided with a vibration unit 41 for detecting an inspection wave and concurrently installed advanceably and retractably in an axial direction inside the catheter body, and a bias member biasing a force onto the drive shaft for moving the drive shaft forward toward the leading end side thereof.COPYRIGHT: (C)2013,JPO&INPIT【課題】駆動シャフトがカテーテル本体内で後退移動したままの状態となることを防止し、カテーテル本体にキンク等の不具合が発生することを防止し得るカテーテルを提供する。【解決手段】カテーテル1は、検査波が透過する窓部26を備えたカテーテル本体2と、検査波を検出する振動子ユニット41を備えるとともにカテーテル本体内に軸方向に進退移動可能に設けられる駆動シャフトと、駆動シャフトを先端側に向けて前進移動させる力を駆動シャフトに付勢する付勢部材と、を有するカテーテル1である。【選択図】図1
