To evade timewise and spatial deviations of scanning thereafter due to interruption of the scanning.

This X-ray CT device is provided with a scanner 1 for carrying out the scanning, a bed 2, a tomographic image reconstruction processing part 13, a tomographic image display part 16, a scanning expert system 11 for supporting setting of a scanning schedule including the number of times/an order of the scanning, the start time of each scanning, suspension time between the scannings, a scanning range of each scanning and a top plate moving amount between the scannings and controlling the scanner and the bed according to the scanning schedule, and an input device 10 for inputting a scanning interrupting instruction. When the interrupting instruction is inputted, the scanning expert system 11 corrects the suspension time so as to maintain the start time of each remaining scanning and corrects the moving amount of a top plate so as to maintain a scanning position of each scanning.