This X-ray imaging apparatus (100) includes an X-ray irradiation detection unit (1) including an X-ray tube (11) and an FPD (2), a table (2) on which a subject (10) is placed, and a control unit (3) that synthesizes a first X-ray image obtained by sequentially performing X-ray imaging using a contrast medium while moving the table relative to the X-ray irradiation detection unit and a second X-ray image obtained by radiographing, without using the contrast medium, the subject at one position selected based on the first X-ray image.