PROBLEM TO BE SOLVED: To provide a radiation imaging device that can suppress degradation in image quality of an imaged radiation image, and a radiation imaging system.SOLUTION: A light guide plate 61 that guides light from a light source 95 to a radiation detector 60 is subjected to detection of white turbidity. If white turbidity in the light guide plate 61 is detected, notification is provided.COPYRIGHT: (C)2012,JPO&INPIT【課題】撮影される放射線画像の画質の低下を抑制できる放射線撮影装置、及び放射線撮影システムを提供する。【解決手段】光源95からの光を放射線検出器60に導光する導光板61の白濁を検出を行い、導光板61の白濁が検出された場合、報知を行う。【選択図】図7