PROBLEM TO BE SOLVED: To provide an endoscope insertion aid having such a configuration that a plurality of elbow parts can easily pass through, without reducing insertability.SOLUTION: The endoscope insertion aid includes a coil 2 configured so that an insertion part of an endoscope is freely inserted through the slender inside of the coil 2 in an insertion direction S, a rough winding part 2a located on the top end side of the coil 2, a dense winding part 2c located behind the rough winding part 2a in the coil 2, and an expanded diameter member 3 provided in the rough winding part 2a. The rough winding part 2a has a projecting part more projecting to the top end side than the expanded diameter member 3 and the top end of the projecting part constitutes the top end of the rough winding part 2a.COPYRIGHT: (C)2012,JPO&INPIT【課題】複数のエルボ部を、挿入性を低下させることなく、容易に通過させることのできる構成を有する内視鏡挿入補助具を提供する。【解決手段】挿入方向Sに沿って細長な内部に内視鏡の挿入部が挿通自在なコイル2と、コイル2の先端側に位置する粗巻き部2aと、コイル2における粗巻き部2aよりも後方に位置する密巻き部2cと、粗巻き部2aに設けられた拡径部材3と、を具備し、粗巻き部2aは、拡径部材3よりも先端側に突出する突出部を有しており、突出部の先端が、粗巻き部2aの先端を構成している。【選択図】図2
