PROBLEM TO BE SOLVED: To provide an insertion apparatus eliminating a selection of a size as much as possible and flattening a part of a duct.SOLUTION: The insertion apparatus includes: a first flexible tube to be inserted from a distal side along a longitudinal axis to the inside of a duct a second flexible tube with an overhang part elastically deformed between a non-overhang position along the longitudinal axis of the first flexible tube, and an overhang position arcuately overhanging from the first flexible tube in a direction crossing with the longitudinal axis of the first flexible tube, outward pressing an inner wall of the duct at the overhang position and flattening at least a part of the duct and a fixing part provided at a distal side with respect to the overhang part and fixing a part of the first flexible tube and a part of the second flexible tube.SELECTED DRAWING: Figure 1ACOPYRIGHT: (C)2017,JPO&INPIT【課題】 サイズの選択を極力不要にして、管路の一部を偏平させることが可能な挿入機器を提供する。【解決手段】 挿入機器は、長手軸に沿って先端側から管路の内側に挿入される第1可撓管と、前記第1可撓管の前記長手軸に沿った非張出位置と前記第1可撓管の前記長手軸に対して交差する方向に前記第1可撓管から弓形に張り出す張出位置との間を弾性変形して、前記張出位置で前記管路の内壁を外側に押圧して前記管路の少なくとも一部を偏平させる張出部を有する第2可撓管と、前記張出部よりも先端側に設けられ、前記第1可撓管の一部と前記第2可撓管の一部とを固定する固定部とを有する。【選択図】図1A
