The X-ray imaging apparatus (100) is provided with an imaging unit (2), a moving mechanism (4), and an image processing unit (17) for generating a subject image (42). The image processing unit is configured to set a reference plane (34) that is an imaging region when generating a subject image and generate the subject image on the reference plane. In a case where there is a plurality of X-ray images in which pixel corresponding points are reflected, the image processing unit is configured to select the pixels corresponding to the pixel corresponding points in the X-ray image in which the pixel corresponding points are reflected to determine pixel values of the pixel corresponding points.