A solid-state imaging device which has L pieces of imaging pixel regions, L being an integer of 2 or more, arranged along a first direction and captures a radiation image of a subject irradiated with radiation from a radiation source, the solid-state imaging device comprising: a light receiving part having the L pieces of imaging pixel region, wherein each of the L pieces of imaging pixel region includes M × N pieces of pixel arranged two-dimensionally, M being an integer of 2 or more and N being an integer of 2 or more, and pixels constituting each column of an M-row by N-column matrix corresponding to a two-dimensional array of the M × N pieces of pixel extend along a second direction crossing the first direction; a row selection unit configured to output an electric signal corresponding to a charge quantity generated in each pixel constituting any one row of the M-row by N-column matrix; a column selection unit configured to output an analog signal based on the electric signal outputted from each pixel constituting a row selected by the row selection unit, to an output wiring for each column of the M-row by N-column matrix; L pieces of A/D converter respectively provided corresponding to the L pieces of imaging pixel region, and configured to convert an analog signal transmitted via the output wiring into a digital signal constituting a frame image; and a control system configured to output, during a period of acquiring at least one specific frame image among a plurality of frame images obtained by repeatedly capturing a radiation image of the subject, an A/D conversion control signal once or more times for causing at least any A/D converter selected from among the L pieces of A/D converter to execute a dummy A/D conversion after the selected A/D converter converts an analog signal from a pixel constituting an m-th row out of the M-row by N-column matrix into a digital signal and before converting an analog signal from a pixel constituting an (m + 1)-th row into a digital signal, the m being an integer of 1 or more and M or less. a light receiving part having the L pieces of imaging pixel region, wherein each of the L pieces of imaging pixel region includes M × N pieces of pixel arranged two-dimensionally, M being an integer of 2 or more and N being an integer of 2 or more, and pixels constituting each column of an M-row by N-column matrix corresponding to a two-dimensional array of the M × N pieces of pixel extend along a second direction crossing the first direction; a row selection unit configured to output an electric signal corresponding to a charge quantity generated in each pixel constituting any one row of the M-row by N-column matrix; a column selection unit configured to output an analog signal based on the electric signal outputted from each pixel constituting a row selected by the row selection unit, to an output wiring for each column of the M-row by N-column matrix; L pieces of A/D converter respectively provided corresponding to the L pieces of imaging pixel region, and configured to convert an analog signal transmitted via the output wiring into a digital signal constituting a frame image; and a control system configured to output, during a period of acquiring at least one specific frame image among a plurality of frame images obtained by repeatedly capturing a radiation image of the subject, an A/D conversion control signal once or more times for causing at least any A/D converter selected from among the L pieces of A/D converter to execute a dummy A/D conversion after the selected A/D converter converts an analog signal from a pixel constituting an m-th row out of the M-row by N-column matrix into a digital signal and before converting an analog signal from a pixel constituting an (m + 1)-th row into a digital signal, the m being an integer of 1 or more and M or less. <EOS>