An X-ray exposure control device comprises: an X-ray detection element including a plurality of pixels for dose detection each detecting a dose during X-ray radiation； a region setting unit configured to set a use pixel region including pixels for use in dose detection from the plurality of pixels for dose detection during the X-ray radiation； a signal generating unit configured to generate a stop signal for stopping the X-ray radiation from an X-ray source according to the dose detected by each of the pixels for use in the dose detection within the use pixel region set by the region setting unit； and a transmission unit configured to transmit to the X-ray source the stop signal to stop the X-ray radiation as generated by the signal generating unit.
