PROBLEM TO BE SOLVED: To provide an endoscope system capable of securing appropriate flexural rigidity of an insertion section, while retaining a slide length of the endoscope insertion section.SOLUTION: The endoscope system includes an endoscope, and an insertion aid 50 in which the endoscope is inserted and which assists insertion of an endoscope insertion section 12 into a body. A balloon is provided at the distal end side of the tube body of the insertion aid 50. A soft part 36 of the endoscope insertion section 12 includes a projection area 70 that, when the endoscope insertion section 12 is located at a distal position in a forward/backward movable range of the insertion aid 50 with respect to a tube body, projects from a distal opening 56 of the tube body. The projection area 70 has a flexural rigidity change part, the flexural rigidity of which increases from a first position on the distal side toward a second position on a proximal side.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2019,JPO&INPIT【課題】内視鏡挿入部のスライド長を維持しつつ挿入部の適切な曲げ剛性を確保できる内視鏡システムを提供する。【解決手段】内視鏡システムは、内視鏡と、内視鏡が挿通され内視鏡挿入部12の体内への挿入を補助する挿入補助具50とを有する内視鏡システムであって、挿入補助具50のチューブ本体の先端側にバルーンが設けられ、内視鏡挿入部12の軟性部36は、内視鏡挿入部12が挿入補助具50のチューブ本体に対する進退可能範囲の先端位置に位置するときチューブ本体の先端開口56から突出する突出領域70を有し、突出領域70は、先端側の第1位置から基端側の第2位置に向かって曲げ剛性が増加する曲げ剛性変化部を有する。【選択図】図3
