PROBLEM TO BE SOLVED: To provide an X-ray diagnostic apparatus which simplifies work during photographing.SOLUTION: The X-ray diagnostic apparatus includes: an X-ray detector 8 which is each provided on a photographing stand 4 for standing position and a photographing stand 6 for supine position, and detects the transmitted X-rays of a subject a carriage 10 which supports an X-ray tube 2 and can move between the photographing stands 4 and 6 a photographing condition setting part 12 which acquires photographing conditions, determined for each photographing body position and photographing part of the subject, from a photographing condition information memory and sets the photographing conditions corresponding to the subject and further a photographing condition change means which acquires the photographing conditions, corresponding to the photographing part according to the photographing conditions set to a control means and also corresponding to the photographing body position discriminated by a standing/supine position discrimination means, from the photographing condition information memory, changes the acquired conditions to the photographing conditions for the subject, and sets the changed conditions to the control means, when the photographing body position discriminated by the standing/supine position discrimination means for discriminating the photographing body position of the subject from the angle of X-rays irradiated from the X-ray tube 2 detected by an angle detector 26 is different from the photographing body position corresponding to the photographing condition set to the control means.COPYRIGHT: (C)2011,JPO&INPIT【課題】撮影時の作業を簡略化させる。【解決手段】立位撮影台4及び臥位撮影台6にそれぞれ設けられ、被検体の透過X線を検出するX線検出器8と、X線管2を支持し、立位撮影台4と臥位撮影台6との間を移動可能な台車部10と、被検体の撮影体位と撮影部位ごとに決められた撮影条件を撮影条件情報メモリから取得して被検体に応じた撮影条件に設定する撮影条件設定部12とを備えたX線診断装置において、X線管2から照射されるX線の角度検出器26により検出されたX線の角度から被検体の撮影体位を判別する立臥位判別手段により判別された撮影体位と、制御手段に設定された撮影条件に対応する撮影体位とが異なる場合に、制御手段に設定された撮影条件に対応する撮影部位と立臥位判別手段により判別された撮影体位に対応する撮影条件を撮影
