PROBLEM TO BE SOLVED: To provide an X-ray CT imaging apparatus capable of generating X-ray imaging information of a wide imaging region extending in the direction of a turning axis even with an X-ray detector having a small X-ray detection surface. In an X-ray CT imaging apparatus 1, a swivel arm 30 in which an X-ray generator 10 and an X-ray detector 20 are opposed to each other with a head of a subject M1 sandwiched therebetween, and an irradiation direction of an X-ray cone beam Bx. The XY table 35 for moving the revolving arm 30 so as to offset from the center of the photographing area CA, and the axial direction change for changing the revolving arm 30 along the Z-axis direction from the first photographing area R1 to the second photographing area R2. The main body control unit 60 includes a mechanism 43, a main body control unit 60 that controls the movement of the revolving arm 30 and X-ray CT imaging, and a stitch image information generation unit 861b that generates the stitch image information Is. The first CT imaging information I1 is composed of the offset CT imaging information Io by controlling the imaging and controlling and executing the generation of the first CT imaging information I1 and the second CT imaging information I2. [Selection diagram] Fig. 3【課題】Ｘ線検出面が小さいＸ線検出器でも、旋回軸方向に及ぶ広範囲の撮影領域のＸ線撮影情報を生成できるＸ線ＣＴ撮影装置を提供する。【解決手段】Ｘ線ＣＴ撮影装置１であって、被写体Ｍ１の頭部を挟んでＸ線発生器１０とＸ線検出器２０を対向させた旋回アーム３０と、Ｘ線コーンビームＢｘの照射方向が撮影領域ＣＡの中心からオフセットするように旋回アーム３０を移動させるＸＹテーブル３５と、第一撮影領域Ｒ１から第二撮影領域Ｒ２へとＺ軸方向に沿って旋回アーム３０を変化させる軸方向変更機構４３と、旋回アーム３０の移動とＸ線ＣＴ撮影を制御する本体制御部６０と、スティッチ画像情報Ｉｓを生成するスティッチ画像情報生成部８６１ｂを備え、本体制御部６０がＸＹテーブル３５とオフセットＣＴ撮影の制御と、第一ＣＴ撮影情報Ｉ１と第二ＣＴ撮影情報Ｉ２の生成の制御及び実行し、第一ＣＴ撮影情報Ｉ１をオフセットＣＴ撮影情報Ｉｏから構成する。【選択図】図３
