PROBLEM TO BE SOLVED: To provide a radiation detector and a radiation image photographing apparatus capable of suppressing warpage due to changes in the temperature regardless of adhesive strength.SOLUTION: The radiation detector includes: a scintillator layer 36 in which an incident radiation X is converted into light a light detection substrate 30 on which the scintillator layer 36 is provided, and in which the light emitted from the scintillator layer 36 is converted into an electrical charge and a bimetal 60 which is constituted by joining two metal plates different in thermal expansion coefficient from each other, provided on the side of the light detection substrate 30 or on the side of the scintillator layer 36, has one metal plate close to the thermal expansion coefficient of the provided place disposed in the inside, has the other metal plate disposed in the outside, and suppresses the warpage of the light detection substrate 30.COPYRIGHT: (C)2012,JPO&INPIT【課題】接着強度に関らず、温度変化による反りを抑制可能な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】入射する放射線Xを光に変換するシンチレータ層36と、面上にシンチレータ層36が設けられ、シンチレータ層36から放出された光を電荷に変換する光検出基板30と、熱膨張率が互いに異なる二枚の金属板を接合して構成され、光検出基板30側又はシンチレータ層36側に設けられ、設けられた場所の熱膨張率と近い一方の金属板が内側に配置され、他方の金属板が外側に配置されて、光検出基板30の反りを抑制するバイメタル60と、を備える。【選択図】図4
