A radiation imaging apparatus includes: a radiation irradiating apparatus that emits radiation onto a subject； a photography unit that photographs the subject to obtain a photographed image of the subject； and a radiation detector that generates radiation images of the subject, provided with a marker that represents identifying information of the radiation detector on the side thereof that includes a radiation detecting surface. The marker of the radiation detector is detected. The identifying information of the radiation detector is obtained from a marker in the case that the marker is detected.
