Radiation detection device

A radiation detection device comprising:

• a radiation detection panel;
• a supporting member having a first surface and a second surface being opposite to the first surface, wherein the radiation detection panel is provided at a side of the first surface;
• first and second power supply units that supply operating electric power of the radiation detection panel;
• a housing that accommodates the radiation detection panel, the supporting member, and the first power supply unit;
• and
• a holder portion which is provided on the second surface of the supporting member and to which the second power supply unit is detachably attached,
• wherein the holder portion comprises a pair of frames that protrude toward a bottom of the housing which faces the second surface of the supporting member and a concave portion that is provided between the pair of frames and is capable of accommodating the second power supply unit, and
• the bottom of the housing has an opening portion through which the concave portion is exposed.