PROBLEM TO BE SOLVED: To provide a radiographic imaging device that suppresses the effect of noise caused by electromagnetic waves from a power supply unit, and accurately detects irradiation of radiation.SOLUTION: A radiographic imaging device includes pixels for radiation detection 32A, for detecting radiation with which an imaging area 31 has been irradiated, arranged in various distribution in accordance with the degree of separation from a DC/DC converter 71, and detects irradiation of radiation based on the detection result by each of the pixels for radiation detection 32A.COPYRIGHT: (C)2012,JPO&INPIT【課題】電源部から照射される電磁波の影響によるノイズの影響を抑えて放射線の照射を精度よく検知できる放射線画像撮影装置を提供する。【解決手段】撮影領域31に照射された放射線を検出する放射線検出用画素32AをDC/DCコンバータ71からの離隔度合に応じて分布を変えて配置し、各放射線検出用画素32Aによる検出結果に基づいて放射線の照射の検知を行う。【選択図】図9