For the purpose of putting a vertical X-ray imaging apparatus using a Talbot-Lau interferometer into practical use, the X-ray imaging apparatus 1 includes an X-ray source 11, a multi-slit 12, a first grating 14 and a second grating 15. A driving unit 12a, a subject table 13, and an X-ray detector 16, and an X-ray source 11, a multi-slit 12, a subject table 13, a first grating 14, a second grating 15, and an X-ray detector 16. Are arranged in this order, and the multi-slit 12 is moved in a direction orthogonal to the X-ray irradiation direction by the drive unit 12a, and X-rays irradiated by the X-ray source 11 each time the multi-slit 12 moves at a constant cycle interval. In response to this, the X-ray detector 16 repeats the process of reading the image signal to obtain a plurality of moire images at regular intervals.タルボ・ロー干渉計を用いた縦型のＸ線撮影装置を実用化することを目的とし、Ｘ線撮影装置１は、Ｘ線源１１と、マルチスリット１２、第１格子１４及び第２格子１５と、駆動部１２ａと、被写体台１３と、Ｘ線検出器１６と、を備え、Ｘ線源１１、マルチスリット１２、被写体台１３、第１格子１４、第２格子１５、Ｘ線検出器１６がこの順に配置され、駆動部１２ａによりマルチスリット１２をＸ線の照射方向と直交する方向に移動し、マルチスリット１２が一定周期間隔で移動する毎に、Ｘ線源１１により照射されたＸ線に応じてＸ線検出器１６が画像信号を読み取る処理を繰り返し、一定周期間隔のモアレ画像を複数得る。
