To provide a medical X-ray apparatus setting an entire body to be a radiographing object capable of preparing a three-dimensional image excellent in a picture quality in a short time.

A circular-arc arm 50 supports an X-ray tube 51 being an X-ray irradiating means and an X-ray detector 52 by arranging to face each other. This arm 50 is supported by a holder 53 to be rotatable by 180° around the body axis of an examinee. The holder 53 is additionally supported by a supporting table 55 in the state of being rotatable by 360° with an axis orthogonal to the body axis of the examinee in a center. In addition a stand 60 being a top plate supporting means erected on a floor surface holds a top plate 62. A capsule 63 for laying the examinee is disposed on the plate 62 and the capsule 63 are swung by 180° with an axis parallel with the body axis of the examinee in a center.