PROBLEM TO BE SOLVED: To provide an device mounted to an insertion portion rapidly and easily installed to an insertion portion.SOLUTION: A balloon unit 1 that is the device mounted to an insertion portion installed to the insertion portion inserted into a body cavity includes: a balloon portion 3 mounted to the insertion portion and a connection tube 5 having one end connected to the balloon portion 3, and feeding a fluid to the balloon portion 3. The connection tube 5 is helically extended along the longitudinal direction, and a dimension in the longitudinal direction can change.COPYRIGHT: (C)2012,JPO&INPIT【課題】挿入部に迅速かつ容易に装着可能な挿入部装着器具を提供すること。【解決手段】体腔内に挿入される挿入部に装着される挿入部装着器具であるバルーンユニット1は、挿入部に取付けられるバルーン部3と、バルーン部3に一端が接続され、バルーン部3に流体を送る接続チューブ5を備える。接続チューブ5は、長手方向に沿って螺旋状に延設され、長手方向の寸法が変化可能である。【選択図】図1
