A self-service observing device for observing oral cavity by the patient itself is composed of a rod-shape supporter with a connector whose axis is perpendicular to the axis of said rod-shaped supporter, a miniature camera head connected mechanically with said supporter via said connector, an image processing circuit able to turn over image left or right, a video cable connected between camera head and image processing circuit, a TV set connected to said image processing circuit, and at least 4 LEDs around said connector. |