PROBLEM TO BE SOLVED: To provide a technique advantageous for reducing the influence of radiation noise by a circuit board on a sensor panel while suppressing an increase in the size of a radiation imaging device.SOLUTION: A radiation imaging device comprises: a sensor panel in which a plurality of sensors for radiation detection are arranged； a first circuit board including a circuit for reading a signal from each sensor and arranged on the sensor panel； and a second circuit board which includes a circuit for reading a signal from each sensor and is arranged on the first circuit board, and in which the amount of radiation noise generation when the circuit for reading a signal from each sensor is driven is larger than the amount of radiation noise generation when the circuit of the first circuit board is driven. The first circuit board is arranged between the sensor panel and the second circuit board.SELECTED DRAWING: Figure 1【課題】放射線撮像装置のサイズの増大を抑制しながら回路基板によるセンサパネルへの放射ノイズの影響を低減するのに有利な技術を提供する。【解決手段】放射線撮像装置は、放射線を検出するための複数のセンサが配列されたセンサパネルと、各センサから信号を読み出すための回路を有する第１回路基板であって前記センサパネルの上に配された第１回路基板と、各センサから信号を読み出すための回路を有し且つ該回路の駆動時の放射ノイズの発生量が前記第１回路基板の回路の駆動時の放射ノイズの発生量よりも大きい第２回路基板であって前記第１回路基板の上に配された第２回路基板と、を備え、前記第１回路基板は、前記センサパネルと前記第２回路基板との間に配置されている。【選択図】図１
