PROBLEM TO BE SOLVED: To provide an endoscope guide tube which allows for removing liquid such as lubricating oil that gets attached on a tip portion, an objective optical system in particular, of an insertion portion of an endoscope while inserting the insertion portion into an object under inspection such as an engine, and which thereby allows for reducing inspection time and observing a clear endoscopic image of a target site.SOLUTION: An endoscope guide tube 20 comprises a tube body 22 into which an insertion portion 7 of an endoscope 3 is inserted a contact part 27 provided at a tip of the tube body 22 and designed to be brought into contact with a surface of an observation window 12 of the endoscope 3 and grooves 28 that are provided on the contact part 27 to suck up liquid attached to the surface of the observation window 12.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2017,JPO&INPIT【課題】 内視鏡の挿入部をエンジンなどの被検体内部に挿入する際に、挿入部の先端部、特に対物光学系の表面に付着した潤滑オイルなどの液体を除去することができ、検査作業時間を短縮できると共に、目的部位をクリアな内視鏡画像で観察できる内視鏡用ガイドチューブの提供。【解決手段】 内視鏡3の挿入部7が挿入されるチューブ本体22と、チューブ本体22の先端部分に配設され、少なくとも内視鏡3の観察窓12の表面に当接する当接部27と、当接部27に連設されて、観察窓12の表面に付着した液状の付着物を吸い上げる隙間部28と、を備えた内視鏡用ガイドチューブ20。【選択図】図2
