PROBLEM TO BE SOLVED: To provide a dental oral cavity radiographic apparatus including a cover in which an X-ray imaging member can be easily put in/out.SOLUTION: A dental oral cavity radiographic apparatus comprises: an imaging unit which has imaging members (11a, 11b) provided with any one of an imaging plate, an X-ray film and an X-ray imaging element, covers (13a, 13b) consisting of light-shielding material and storing the imaging members and holding parts (15a-15d) holding the covers in the detachable state and an imaging auxiliary tool which has a retention part holding the imaging unit in the rotatable state. The cover is arranged on the side closer to an X-ray device than the retention part. The retention part includes an X-ray shielding member.COPYRIGHT: (C)2016,JPO&INPIT【課題】 簡単にX線の撮像部材の出し入れが可能なカバーを含む歯科用口腔内X線撮影装置を提供する。【解決手段】 歯科用口腔内X線撮影装置は、イメージングプレート、X線フィルム、X線撮像素子のいずれか一つを有する撮像部材(11a、11b)と、遮光材料で構成され撮像部材を収納するカバー(13a、13b)と、カバーを着脱可能な状態で保持する保持部(15a~15d)とを有する撮影部と、撮影部を回転可能な状態で保持する保定部を有する撮影補助具とを備える。カバーは、保持部よりも、X線装置に近い側に配置され、保持部は、X線遮蔽部材を含む。【選択図】図6