PROBLEM TO BE SOLVED: To realize weight reduction and improvement of reliability of a radiation imaging apparatus with a relatively simple configuration. A radiation imaging device according to the present invention includes a flexible radiation detection panel in which a plurality of radiation detection elements are arranged on a substrate, and a housing for accommodating the radiation detection panel. The housing includes a plate portion forming one surface, and the flexible radiation detection panel is supported by the plate portion of the housing at a central portion thereof via a cushioning member. A reinforcing member for suppressing the bending of the radiation detection panel is provided on the edge portion outside the central portion. [Selection diagram] Fig. 1【課題】放射線撮像装置の軽量化および信頼性の向上を比較的簡素な構成で実現する。【解決手段】本発明に係る放射線撮像装置は、基板上に複数の放射線検出素子が配列されて成る可撓性の放射線検出パネルと、前記放射線検出パネルを収容するための筐体と、を備え、前記筐体は、一方面を形成する板部を含み、前記可撓性の前記放射線検出パネルは、その中央部において前記筐体の前記板部により緩衝部材を介して支持されており、前記中央部より外側の縁部には、前記放射線検出パネルの撓みを抑制するための補強部材が設けられている。【選択図】図1