Provided is an X-ray inspection device whereby it is possible to create an X-ray fluoroscopic image of only a region necessary for reconstruction of a CT image. An image acquiring unit 71 acquires a reference image for determining a field-of-view loss region and an image of a work piece as a trimming object from an X-ray detector 3. An average luminance value calculation unit 72 calculates the average luminance value of an image in which there is no field-of-view loss in the reference image. A field-of-view loss region determination unit 73 determines that pixels having a luminance less than a threshold value for the average luminance value calculated by the average luminance value calculation unit 72 are in a field-of-view loss region for a captured fluoroscopic image. A trimming image acquiring unit 75 acquires an X-ray fluoroscopic image other than in a field-of-view loss region from a captured image of the work piece. A reconstruction processing unit 8 reconstructs a CT image on the basis of the X-ray flu
