According to one embodiment, an X-ray computed tomography apparatus includes a gantry body, a column, and fixing equipment. The gantry body includes a bore to form a field of view, and also includes an X-ray tube and an X-ray detector. The column supports the gantry body so that the gantry body is vertically movable with a central axis of the bore extending vertically to a floor face. The fixing equipment fixes a subject holder so that the subject holder is located on a passage of the bore and partially in the bore in a phase of attaching a subject to the subject holder.
