PROBLEM TO BE SOLVED: To provide a radiation detector that suppresses warp of a photo detection substrate.SOLUTION: A radiation detector of the present invention includes: a photo detection substrate 30 that converts light into charge a scintillator layer 36 that is stuck to the photo detection substrate 30 and converts emitted radiation X into light and a reflection board 60 that is arranged opposite to the scintillator layer 36 relatively displaceable in an in-plane direction P and reflects the light converted by the scintillator layer 36 to the photo detection substrate 30 side.COPYRIGHT: (C)2012,JPO&INPIT【課題】光検出基板の反りを抑制する。【解決手段】光を電荷に変換する光検出基板30と、光検出基板30に貼り合わされ、照射された放射線Xを光に変換するシンチレータ層36と、シンチレータ層36にて変換された光を光検出基板30側に反射し、シンチレータ層36と面内方向Pへ相対変位可能に対向配置された反射板60と、を備える。【選択図】図5
