PROBLEM TO BE SOLVED: To provide an endoscope system for preventing breakage of an active type bend part, easily straightening a body cavity, and improving insertability to the body cavity, in the endoscope system including an endoscope having the active type bend part and a passive type bend part and an insertion aid for the endoscope.SOLUTION: An endoscope system 1 includes: an endoscope 2 having a first bend part 7 provided on an insertion part 10 to be inserted into a body cavity, to be actively bent, a second bend part 8 to be passively bent by external force, and a projection part 50 provided on a boundary part of the first bend part 7 and the second bend part 8 and projected and formed around an outer circumference and an insertion aid 60 for the endoscope, having a flexible tube 62 to which the insertion part 10 is freely inserted, and a ring-like hood 61 provided on the distal end of the flexible tube 62 and formed from an elastic member having an opening diameter D2 smaller than the outer diameter d1 of the projection part 50.COPYRIGHT: (C)2014,JPO&INPIT【課題】 能動型の湾曲部および受動型の湾曲部を備えた内視鏡と内視鏡用挿入補助具を備えた内視鏡システムにおいて、能動型の湾曲部の破損を防止すると共に、体腔の直線化を容易に行えるようにして、体腔への挿入性が向上する内視鏡システムの提供。【解決手段】 内視鏡システム1は、体腔内に挿入される挿入部10に設けられ、能動的に湾曲する第1の湾曲部7と、外力により受動的に湾曲する第2の湾曲部8と、第1の湾曲部7と第2の湾曲部8との境界部分に設けられ、外周回りに突起形成された凸部50と、を備えた内視鏡2と、挿入部10が挿通自在な可撓性チューブ62と、可撓性チューブ62の先端に設けられ、凸部50の外径d1よりも小さな開口径D2を有する弾性部材から形成された円環状のフード61と、を備えた内視鏡用挿入補助具60と、を具備する。【選択図】図6
