It is to provide an X-ray CT apparatus, which can realize accuracy and efficiency in a puncturing work. An X-ray CT apparatus 1 creates volume data based on a result obtained by X-ray scanning of a subject E for medical practice with a puncture needle. The X-ray CT apparatus 1 comprises an image processor 42, and a display controller 44. The image processor 42 creates an image of the subject E obtained by scanning, which is performed in a state that the puncture needle is being inserted to the subject E, based on the volume data. The image processor 42 also creates a new planned image, based on displacement between a position of a specific region on an image based on second volume data and a position of a corresponding specific region in a first planned image, which is created based on a first volume data in advance and includes an image I of an insert passage for the puncture needle with respect to the subject E. The display controller 44 allows a display 46 to display a new planned image.
