An objective of the present invention is to better reduce noise in an x-ray fluoroscopic image. Provided is a radiographic image generating device which: receives an input of a plurality of images with different image capture times for an x-ray fluoroscopic image which is image captured using x-rays uses a temporally prior image and a temporally later image among the inputted plurality of images to perform motion detection and detect one instance of movement information in one image computes for each local region a difference between the temporally prior image when positionally offset by the movement information amount and the temporally later image determines, on the basis of the difference for each local region, a region for carrying out a time direction noise reduction process and a region for carrying out a space direction noise reduction process sets three kinds of regions, regions wherein the time direction noise reduction process is carried out and the space direction noise reduction process is not carried out, regions wherein the space direction noise reduction process is carried out and the time direction noise reduction process is not carried out, and regions wherein both the time direction noise reduction process and the space direction noise reduction process are carried out and carries out the noise reduction processes differing by each respective region.La présente invention vise à mieux réduire le bruit dans une image fluoroscopique à rayons X. Linvention concerne un dispositif de génération dimage radiographique qui : reçoit une entrée dune pluralité dimages ayant différents temps de capture dimage pour une image fluoroscopique à rayons X qui est une image capturée à laide de rayons X utilise une image temporellement antérieure et une image temporellement ultérieure parmi la pluralité saisie dimages pour réaliser une détection de mouvement et détecter des informations de mouvement dans une première image calcule, pour chaque région locale, une diff
