To provide a radiation detector capable of effectively discharging an electric charge causing unevenness in a radiation image to the outside in comparison with a case where a wiring for connecting a charge discharge layer to the ground of a cassette casing or the like passes through the outside of the side of a substrate, even when a flexible base material is used for the substrate and to provide a radiation image photographing device.SOLUTION: A radiation detector 10 includes a sensor substrate 12 which has a pixel area 15 on the first surface 14A of a flexible base material 14 made of resin, a conversion layer 30 which is provided in the partial area including the pixel area 15 of the first surface 14A and converts radiation into light, at least one of an adhesive layer 35 which is provided on the surface on the side of the conversion layer 30 of a laminate 33 in which the sensor substrate 12 and the conversion layer 30 are laminated and an antistatic layer 40 which is provided in a second surface 14B opposite to the first surface 14A, and a wiring 50 which is electrically connected to the charge discharge layer. In the base material 14, a through-hole 52 is provided in an area corresponding to the area outside the partial area and the wiring 50 passes through the through-hole 52.SELECTED DRAWING: Figure 3【課題】基板に可撓性の基材を用いた場合であっても、電荷排出層をカセッテ筐体等のグランドに接続する配線が、基板の辺の外部を通る場合に比べて、放射線画像にムラが生じる原因となる電荷を外部に効果的に排出することができる放射線検出器及び放射線画像撮影装置を提供する。【解決手段】放射線検出器１０は、可撓性かつ樹脂製の基材１４の第１の面１４Ａに画素領域１５を有するセンサ基板１２と、第１の面１４Ａの、画素領域１５を含む一部の領域に設けられ、放射線を光に変換する変換層３０と、センサ基板１２と変換層３０とが積層された積層体３３における変換層３０側の面に設けられた接着層３５、及び第１の面１４Ａと反対側の第２の面１４Ｂに設けられた帯電防止層４０の少なくとも一方と、電荷排出層と電気的に接続された配線５０とを備え、基材１４は、一部の領域外の領域に対応する領域に貫通孔５２が設けられており、配線５０は貫通孔５２を通る。【選択図】図３
