PROBLEM TO BE SOLVED: To provide an intraoral X-ray imaging aid and an intraoral X-ray imaging tool in which a photoreceptor can easily be arranged at a patients mouth, and further radiation exposure other than an imaging object region can be prevented.SOLUTION: An intraoral X-ray imaging aid has a mouth arrangement part 2, a grip part 6 and a linear arm part 4. The mouth arrangement part 2 and the grip part 6 are connected by the arm part 4. The mouth arrangement part 2 is formed of materials for attenuating X-rays. The mouth arrangement part 2 has a size being equal to an imaging plate. The mouth arrangement part 2 can hold a protective cover 7 in the mouth. When making the mouth arrangement part 2 hold the protective cover 7, the imaging plate and the mouth arrangement part 2 are overlapped in the direction of travel of the X-rays.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】患者の口内に容易に感光体を配置することができ、さらに撮影対象部位以外の被曝を抑制することができる口内法X線撮影用補助具、並びに、口内法X線撮影具を提供することである。【解決手段】口内配置部2と把持部6と直線状のアーム部4を有し、口内配置部2と把持部6がアーム部4で繋がっており口内配置部2は、X線を減衰させる素材で形成されており、口内配置部2は、イメージングプレートと同等の大きさを有しており、口内配置部2は、保護カバー7を口内で保持可能であり、口内配置部2に保護カバー7を保持させると、イメージングプレートと口内配置部2がX線の進行方向に重なる。【選択図】図1