Coiled member with an elastic force to a predetermined stretchable, is set to a length compression length is predetermined, the insertion portion rigidity varying the balloon catheter with the tube of flexible predetermined and having a fluid conduit A body comprises a sheath end having a contact surface with one end surface of the coil-shaped member abuts a larger diameter than the sheath body provided at one end of the sheath body and the sheath body coil member is enclosed, sheath an insertion portion having an opening of a fluid line to the end, comprises a sheath having an other opening of the fluid line at the other end of the sheath body, is provided at the sheath end of the sheath, one of the fluid conduit The sheath end to contract by the outer diameter swells to a diameter larger than the outer diameter of the sheath end is expanded by the fluid supplied via the opening, fluid is discharged through an opening a balloon freely expanded and contracted, which is configured to be in close contact with the outer peripheral surface, and is fixed to the other end of the sheath, the supply of fluid into the balloon, or to perform the discharge of the fluid in the balloon through a fluid conduit directly with the fluid supply and discharge device, or is slidably disposed within the inner peripheral surface side of the operation portion main body and the operation portion main body comprises a fluid supply and discharge device connection portion connected indirectly, the elastic force having the coil member I have, an operation unit including a sliding member disposed on the other end side of the operation portion main body by挿入部硬度可変バルーン付カテーテルは、伸縮自在で予め定めた弾性力を備え、圧縮長が予め定められ長さに設定されたコイル状部材、および流体管路を有する予め定めた可撓性のチューブ体であって、コイル状部材が囲繞されるシース本体及びシース本体の一端側に設けられシース本体より太径でコイル状部材の一端面が当接する当接面を有するシース端部を備え、シース端部に流体管路の一開口を有し、シース本体の他端側に流体管路の他開口を有するシースを具備する挿入部と、シースのシース端部に設けられ、流体管路の一開口を介して流体が供給されることによって膨張して外径寸法がシース端部の外径よりも大径に膨らみ、一開口を介して流体が排出されることによって収縮してシース端部の外周面に密着するように構成された膨縮自在なバルーンと、シー
