This radiation image capturing device is provided with: a sensor substrate including a flexible base material and a plurality of pixels that accumulates electrical charges generated by radiation； a flexible first cable having one end electrically connected to a connection region provided on a predetermined side of the sensor substrate； and a first circuit substrate which is electrically connected to the other end of the first cable and on which a first component of a circuit unit that is operated when reading the electrical charges accumulated in the plurality of pixels is mounted in a direction crossing the predetermined side of the sensor plate to which the first cable is connected, the first component being mounted so as to be aligned with the longest side of the sensor plate or with a side having at least a predetermined length.本發明之放射線圖像攝影裝置具備：感測器基板，包括可撓性基材及蓄積依據放射線產生之電荷之複數個像素；可撓性之第1電纜，一端與設置於該感測器基板之預先確定之一邊之連接區域電連接；及第1電路基板，電連接於該第1電纜之另一端，且以預先確定之長度以上之一邊或最長一邊沿與連接有該第1電纜之該感測器基板之該預先確定之一邊交叉之交叉方向之狀態裝載有讀取蓄積於該複數個像素之電荷時驅動之電路部之第1零件。
