Problem to be solved: to provide an X-ray tomographic apparatus capable of adjusting the rotational balance of the gantry rotation portion in a wide range and capable of simple control. The X-ray tomographic apparatus 100 includes a rotating portion 130 having an X-ray tube 102 and an X-ray detector 104 for detecting X-rays from the X-ray tube, and at least two mass bodies (M1, M2) disposed in the rotating portion and movable in the circumferential direction There is also provided a drive portion 72 for moving two mass bodies, a sensor (s) for measuring the vibration of the rotating portion, and a control unit 137 for controlling the drive portion to move the mass body on the basis of the output of the sensor. Diagram【課題】広い範囲でガントリ回転部の回転バランスを調整することができ、且つ簡易な制御ができるX線断層撮影装置を提供する。【解決手段】X線断層撮影装置100は、X線管102と該X線管からのX線を検出するX線検出器104とを有する回転部130と、回転部に配置され円周方向に移動可能な少なくとも2つの質量体(M1、M2)と、少なくとも2つの質量体を移動させる駆動部72と、回転部の振動を測定するセンサ(S)と、センサの出力に基づいて質量体を移動させるため駆動部を制御する制御部137とを備える。【選択図】図3
