Provided is a radiation imaging apparatus that is safe and does not require a troublesome imaging because an external instrument is not pulled by the subject even if the subject is tilted. The radiation imaging apparatus according to the present invention is configured to be able to rotate and lift the top plate 2 on which the subject M is placed. A characteristic of the present invention is that the top plate 2 is maintained at a constant height in the vertical direction at the intersection of the straight line connecting the X-ray tube 3 and the FPD 4 and the top plate 2 in conjunction with the operation of the top plate rotation control unit 10. The height of the plate 2 is controlled. In this way, the height of the region of interest in the subject M (the region related to imaging) is always constant regardless of the rotation of the top 2. By doing so, the distance between the subject M and the external instrument on the floor is not changed, and the external instrument is suppressed from being pulled by the vertical movement of the subject M. Therefore, according to the present invention, it is possible to provide a radiation imaging apparatus that is safe and saves the trouble of imaging.被検体を傾斜させても外部器具が被検体に引っ張られることがなく、安全で撮影の手間が省かれた放射線撮影装置を提供する。本発明に係る放射線撮影装置は、被検体Ｍを載置する天板２を回転および昇降できるようになっている。本発明で特徴的なのは、天板回転制御部１０が動作するのに連動してＸ線管３およびＦＰＤ４を結ぶ直線と天板２との交点の鉛直方向における高さを一定に保つように天板２の高さが制御されるのである。この様にすると、被検体Ｍにおける関心部位（撮影に係る部位）の高さが天板２の回転に関わらず常に一定となる。この様にすることで被検体Ｍと床面上の外部器具との間の距離が変化せず、外部器具が被検体Ｍの上下動で引っ張られることが抑制される。したがって、本発明によれば、安全で撮影の手間が省かれた放射線撮影装置を提供できる。
