The tube for bile duct insertion which has with the 1st end and the 2nd end. It possesses the 1st end, the 1st part which is formed inside the bile duct by insertion possible diameter and, it possesses the 2nd end, the 2nd part which is formed inside the intestinal tract by arrangement possible diameter and, the 1st expansion component which is arranged in the 1st part and, it has. The 1st expansion component expands to the diameter direction of the tube for bile duct insertion by the vapor or the liquid being filled in the air gap which the 1st expansion component has inside.第1の端部と第2の端部とを備える胆管挿入用チューブ。第1の端部を有し、胆管内に挿入可能な径により形成される第1の部分と、第2の端部を有し、腸管内に配置可能な径により形成される第2の部分と、第1の部分に配置された第1の膨張部材と、を備える。第1の膨張部材は、第1の膨張部材が内部に有する空隙に気体又は液体を注入されることにより、胆管挿入用チューブの径方向に膨張する。
