A radiation detector is provided and includes: an array substrate comprising a plurality of control lines extending in a first direction, a plurality of data lines extending in a second direction crossing the first direction, and a detection unit that is provided in each of a plurality of regions demarcated by the plurality of control lines and the plurality of data lines and electrically connected to the corresponding control line and the corresponding data line, and detects radiation directly or in cooperation with a scintillator; gate drivers electrically connected to the plurality of control lines, respectively; a drive control circuit which generates start signals and clock signals for the plurality of gate drivers, respectively, and converts the generated plurality of start signals and plurality of clock signals into first serial data; a drive timing generation circuit which is electrically connected between the drive control circuit and the plurality of gate drivers, restores the first serial data to the plurality of start signals and the plurality of clock signals, and transmits the restored start signals and clock signals to the corresponding gate drivers; readout circuitselectrically connected to the plurality of data lines, respectively; an image data signal transfer circuit which converts image data signals from the respective plurality of readout circuits into second serial data; and a control circuit which restores the second serial data to the plurality of image data signals.