In order to provide an X-ray imaging device which is capable of reducing storage capacity for storing radiographic sequential images, an X-ray imaging device (5) according to the present invention comprises: an X-ray irradiation unit (110) which irradiates a subject (1) with X-rays； an image generation unit (124) which detects the X-rays passed through the subject (1) and generates an image on the basis of the detected X-rays； an operational unit (246) for moving an imaging position of the subject (1)； a control unit (330) which detects movement of the imaging position of the subject (1) and generates a compression control signal (332)； an image compression unit (222) which carries out a compression process on the image according to the compression control signal (332)； and a storage unit (230) which stores the compression processed image.
