There is provided an X-ray CT apparatus that allows easy and correct confirmation of which position a bed can be moved to and which region can be imaged. The X-ray CT apparatus performs imaging for obtaining a scanogram 301 (S101), displays the scanogram 301 (S102), and calculates a transversely movable region 304 (S103). Further, the X-ray CT apparatus inputs size of a bow tie filter 103 (S201), inputs a transverse movement destination of a bed 106 (S105), calculates an imageable region on the basis of the size of the bow tie filter and the transverse movement destination 302 (S202), and displays the imageable region 305 (S203).
