A radiographic image capturing system includes: a radiation irradiating apparatus which emits radiation and provides notification of radiation emission while emitting the radiation； a radiographic image capturing apparatus which includes two-dimensional matrix radiation detecting elements and reads electric charges accumulated in the radiation detecting elements as image data； an exposure switch capable of two-step manipulations, the exposure switch transmitting an activation signal in response to a first-step manipulation and transmitting a radiation start signal in response to a second-step manipulation； a signal transceiver which receives the activation signal and transfers the received activation signal to the radiation irradiating apparatus； and a delay time calculating device which calculates, as a delay time, a difference between a time of reception of the activation signal at the signal transceiver and a time of start of the notification of radiation emission at the radiation irradiating apparatus.
