An X-ray CT system including: a rotator including an X-ray tube installed therein a gantry, arranged on a floor part, and configured to rotatably support the rotator a cover configured to cover the rotator and the gantry from the outside and an elastic member, and mounted along the lower edge of the cover, having restoring force, and configured to elastically be in contact with the floor part against the restoring force. The X-ray CT system can reduce noise from inside of the cover.
