To provide a technology that, when a part of pixels for generating a radiation image is used for AEC, and the pixel used for the AEC is a defective pixel, changes the pixel used for the AEC while preventing an influence on accuracy of correction of the defective pixel during the generation of the radiation image.SOLUTION: A radiation imaging device comprises: a plurality of pixels constituting a plurality of rows and columns for acquiring a radiation image； and a reading unit for reading a signal from the plurality of pixels. The reading unit reads a signal from pixels simultaneously selected with a row selection line that commonly connects the plurality of pixels for every row, and when a first pixel, of the plurality of pixels, for detecting an incident dose during imaging of a set radiation image is a defective pixel, reads a signal for detecting the incident dose from a second pixel, in place of the first pixel, which is selected such that at least one row is arranged between the rows including the first pixel from among the plurality of pixels.SELECTED DRAWING: Figure 3【課題】放射線画像を生成するための画素の一部をＡＥＣに用いる際、ＡＥＣに用いる画素が欠陥画素の場合、放射線画像生成時の欠陥画素の補正の精度への影響を抑制しつつＡＥＣに用いる画素を変更する技術を提供する。【解決手段】放射線画像を取得するために複数の行および列を構成する複数の画素と、複数の画素から信号を読み出すための読出部と、を含み、読出部は、複数の画素のうち行ごとに共通に接続された行選択線によって同時に選択された画素から信号を読み出し、複数の画素のうち設定された放射線画像の撮像中に入射線量を検出するための第１の画素が欠陥画素である場合、第１の画素に代えて、複数の画素のうち第１の画素が含まれる行との間に少なくとも１つの行が配されるように選択された第２の画素から入射線量を検出するための信号を読み出す。【選択図】図３
