An X-ray CT device comprises a first X-ray source and a first detector, a second X-ray source and a second detector, a scan performing means, and an image generation means. The scan performing means performs a scan by controlling the first and second X-ray sources and the first and second detectors, and acquires first data of a first detection area and second data of a second detection area in which corresponding detection areas of the multiple first detection areas and the multiple second detection areas composed of one or multiple detection elements in a column direction are shifted by n (0
