PROBLEM TO BE SOLVED: To improve an electromagnetic shield property in a radiation detection device having an arrangement from a side to be irradiated with radiation in order of a conductive member to which fixed potential is supplied, a pixel array, and a scintillator.SOLUTION: A radiation detection device includes: a scintillator 400 a pixel array 302 in which a plurality of pixels P for converting visible light converted by the scintillator 400 into an electric signal is arranged on a first surface 306 of a substrate 301 in a two-dimensional array a first conductive member 200 to which constant potential is supplied. The radiation detection device includes a second conductive member 206 which has an arrangement from a side to be irradiated with radiation in order of a first conductive member 200, the pixel array 302, and the scintillator 400, has the scintillator 400 arranged on a first surface 306 side, is arranged on a side to be irradiated with radiation of the first conductive member 200, and to which constant potential is supplied. The second conductive member 206 is greater than orthogonal projection with respect to the second conductive member 206 of the first conductive member 200.SELECTED DRAWING: Figure 4
