PROBLEM TO BE SOLVED: To provide an insertion assisting device for endoscope, in which promotion force may easily obtained to insert an insertion part into celom.SOLUTION: The insertion assisting device comprises: a supporting part 23 arranged in fixable or fixed condition onto an insertion part extending from an operation part of an endoscope a plurality of celom wall pressing means 24 which is supported on the supporting part in annular direction positioned at outer peripheral side of central axis line A1 of the insertion part and capable of sliding along with slide axis line A2 extending to the side of the operation part with an inclination to the outer peripheral side relatively to the central axis line in projecting direction from the supporting part 23 to the side of the operation part and in direction returning to the side of the supporting part 23 and a driving means sliding the celom wall pressing means 24 relatively to the supporting part 23.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2016,JPO&INPIT【課題】挿入部を体腔へ挿入するための推進力を得やすい内視鏡用挿入補助装置を提供する。【解決手段】内視鏡の操作部から延びる挿入部に対して固定可能又は固定状態で設けた支持部23と、支持部に上記挿入部の中心軸線A1の外周側に位置する環状方向に並べて支持した、中心軸線に対して外周側に傾斜しながら操作部側に延びるスライド軸線A2に沿って支持部23から操作部側に突出する方向及び該支持部23側に戻る方向にスライド可能な複数の体腔壁押圧手段24と、体腔壁押圧手段24を支持部23に対してスライドさせる駆動手段と、を備える。【選択図】図3