PROBLEM TO BE SOLVED: To suppress brakeage due to impact and vibration.SOLUTION: A radiation detection device includes: a radiation detection panel which has a plurality of photoelectric conversion elements arranged on a first surface of a substrate and a scintillator arranged on the first surface side of the substrate a light source part which emits light to the plurality of photoelectric conversion elements arranged on a second surface side facing the first surface of the substrate a housing which has a box part provided with openings corresponding to the plurality of photoelectric conversion elements on a surface facing the light source part and a lid part provided so as to cover the openings and making the radiation penetrate through the radiation detection panel, and includes the radiation detection panel and the light source part and a light source support part which supports the light source so as to deviate in a direction orthogonal to the second surface in a space between the lid part and the second surface.COPYRIGHT: (C)2015,JPO&INPIT【課題】衝撃や振動などによる破損を抑制することを目的とする。【解決手段】放射線検出装置は、基板の第1面に配置された複数の光電変換素子と基板の第1面側に配置されたシンチレータとを有する放射線検出パネルと、基板の第1面と対向する第2面側に配置され複数の光電変換素子に光を照射する光源部と、光源部と対向する面に複数の光電変換素子に対応した開口を有する箱部と開口を覆うように設けられた放射線を前記放射線検出パネルに透過させる蓋部とを含み前記放射線検出パネル及び前記光源部を内包する筐体と、蓋部と第2面との間において第2面と直交する方向に変位可能に前記光源を支持する光源支持部とを有する。【選択図】図1