Photographing auxiliary tool 1 inside the buccal cavity support arm has 10 and the image reception section. Support arm 10 extending from the insertion section, and the insertion section which are inserted into the buccal cavity has the stretching section which projects outside the buccal cavity. The image reception section is installed in the end where the stretching section is not connected in the insertion section. Support arm 10 does not have the component which interferes to the photographing object tooth.口腔内撮影補助具1は、支持腕10及び受像部を備える。支持腕10は、口腔内に挿入される挿入部、及び挿入部から延びて口腔外に突出する延伸部を有する。受像部は、挿入部において延伸部が接続されない端部に取り付けられる。支持腕10は、撮影対象歯牙に干渉する部材を有さない。
