A control device (8) displays a posture item of a subject of which an in-vivo image is to be captured on a capsule image display device (10a), and changes a display mode of the posture item of the subject in response to an input to an input device (9). The control device (8) also displays posture information on the subject when an in-vivo image is captured, together with the in-vivo image, on a diagnostic display device (10b). Accordingly, it is possible to reduce the work of the health care professional required for diagnosis.
