To provide a radiographic imaging system capable of performing appropriate control matching the structure of a radiography table using a small-sized FPD in the long-length radiography such as the radiography for the whole length of lower limbs and the whole vertebrae.

The radiographic imaging system includes a radiation irradiating device having a first moving means for moving an irradiation area for a subject, and an image processing device including an imaging panel with detecting elements disposed in a two-dimensional rectangular shape, a radiographic image data generating part, a memory part and a built-in battery for composing a plurality of radiographic image data captured by the radiography to generate long-length image data. If a wired communication part can not communicate with an outside device, all the radiographic image data generated after termination of the radiography sequence are transmitted to the image processing device via radio communication.