PROBLEM TO BE SOLVED: To improve stability of image quality by reducing a difference in influence on two sensor substrates laminated with each other received from the same electrical component in a housing.SOLUTION: A radiation imaging device comprises: a sensor unit that includes two sensor substrates laminated with each other； a base that supports the sensor unit； an electrical component that is on the opposite side of the sensor unit with respect to the base； and a heat insulating member that includes a portion located between the electrical component and sensor unit. The thermal conductivity of the heat insulating member is lower than the thermal conductivity of the base.SELECTED DRAWING: Figure 1【課題】互いに積層された２枚のセンサ基板が同じ筐体内の電気部品から受ける影響の差を低減して画質の安定性を向上する。【解決手段】放射線撮像装置は、互いに積層された２枚のセンサ基板を含むセンサユニットと、センサユニットを支持する基台と、基台に対してセンサユニットとは反対側にある電気部品と、電気部品とセンサユニットとの間に位置する部分を含む断熱部材と、を備える。断熱部材の熱伝導率は、基台の熱伝導率よりも低い。【選択図】図１
