There are provided a gantry with an opening having a central axis inclined so that the opening is directed obliquely downward, a chair disposed obliquely below the gantry, and having an inclined surface for supporting a patient M so that the central axis of the opening and a body axis A of the patient M become parallel, and a chair moving mechanism for driving at least one of the gantry and the chair to insert the patient M into the opening parallel to the central axis of the opening of the gantry. Thus, images can be picked up of the patient M in a comfortable position safely and efficiently.
