Provided is a radiographic image capturing system for synchronizing an emission of radiation and operation of an imaging device. This radiographic image capturing system is provided with: an emission means for emitting radiation; a detection means for detecting the radiation; a setting means for setting an emission time at which the emission of radiation is started; an emission control means for controlling the emission means so that the radiation is emitted at the emission time; and a detection control means for controlling the detection means so that the radiation can be detected at the emission time.