The X-ray fluoroscopic photographing device of the present invention controls the opening and closing movements of shields 19a to 19d such that the length in the x direction of an image S1 for configuration is longer than the length in the x direction of a strip image P1. That is, the size of the image S1 for configuration is larger than the size of the strip image P1, so there is more information on an X-ray image projected on the image S1 for configuration. Additionally, a marker F indicating a photographing range of the strip image P1 is superimposed and displayed on the image S1 for configuration. As such, by referring to the location of the marker F and the location of the X-ray image projected on the image S1 for configuration, it is possible to easily and reliably verify whether or not a target X-ray image is projected on the strip image when using the location of a current imaging system as the point to start photographing. Moreover, since a difference in the distance between the location of the target X-ray image and the location of the marker F is clear, the location of the imaging system can be quickly and correctly adjusted to an appropriate location as the point to start photographing. Consequently, by slot photographing using the X-ray fluoroscopic photographing device of the present invention, it is possible to quickly acquire a long image suitable for diagnosis.Le dispositif photographique de radioscopie à rayons X de la présente invention commande les mouvements douverture et de fermeture des écrans (19a) à (19d) de sorte que la longueur dans la direction x dune image S1 destinée à la configuration est plus grande que la longueur dans la direction x dune image P1 de bande. Autrement dit, la taille de limage S1 destinée à la configuration est plus grande que la taille de limage P1 de bande, de sorte quune plus grande quantité dinformations est présente sur une projection dimage radiologique sur limage S1 destinée à la configuration. De plus, un marqu
