PROBLEM TO BE SOLVED: To provide an assisting device equipped with a suction function, which can be detachably attached to a stomatoscope.SOLUTION: A stomatoscope assisting device provided to a stomatoscope 30 equipped with a mirror part 32 at the tip of a grip part 31 includes an engaged part 3 engaged with the mirror part 32, which is arranged in the oral cavity. A suction tube 2 connected to a suction machine 10 and attached to the grip part 31 is provided to the engaged part 3. The tip opening of the suction tube 2 is caused to face the inside of the engaged part 3. An adjustment body 4 for adjusting the inner diameter of the engaged part 3 is provided in the engaged part 3. A ventilation gap 5 communicated with the bottom of the engaged part 3 is provided between the inner wall of the adjustment body 4 and the outer wall of the mirror part 32.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2019,JPO&INPIT【課題】口腔鏡に着脱可能で、吸引機能を備えた補助装置を提供する。【解決手段】握柄部31の先端部にミラー部32を設けた口腔鏡30に設けられる口腔鏡補助装置であって、ミラー部32が嵌合され口腔内に配される被嵌合部3を有し、この被嵌合部3には吸引機10と連設され握柄部31に添設される吸引管2が設けられ、この吸引管2の先端開口は被嵌合部3内に臨ましめられ、被嵌合部3内には被嵌合部3の内径を調整する調整体4が設けられ、この調整体4の内壁とミラー部32の外壁との間には被嵌合部3の底部と連通する通気間隙5が設けられる。【選択図】図1