the present invention relates to an x - ray imaging apparatus , comprising : an x - ray imager including an x - ray beam generator for emitting an x - ray beam , an x - ray beam detector for detecting the x - ray beam to obtain an x - ray image of an object , and a main body unit in which the x - ray beam generator and the x - ray beam detector are installed ; and a three - dimensional scanner arranged in the x - ray imager in order to obtain an image of the outer appearance of the object . according to the present invention , an x - ray image and an image of the outer appearance of an object , for example , an image of the skull and an image of the face , can be obtained at the same time , thereby minimizing image correction procedures for matching two images .