An X-ray photographing device includes the X-ray irradiating unit (10) for irradiating the object (5) with the X-ray beam (6) having a slit shape from an X-ray irradiating source (11a), an X-ray imaging member (7) provided with a light-receiving surface (7a) for receiving the X-ray beam 6 transmitted through the object (5), a pivot drive unit for causing the X-ray irradiating unit (10) and the X-ray imaging member (7) to have a pivoting motion on the pivoting center line (La) around the object (5), and a sub-drive unit (30) for causing the X-ray imaging member (7) to have a local motion different from the pivoting motion in a circumferential direction with a shift width (Mw). A width (W2) of the light-receiving surface (7a) in the circumferential direction is smaller than the shift width (Mw) and the local motion is a local rotation motion made on the rotation center line (Lc). This configuration enables to reduce a cost of the X-ray photographing device, and further reduce vibrations of the X-ray imaging member (7) caused by the local motion, and enhance an operating efficiency of the X-ray photographing.
