A camera system (1) for monitoring the inside of a body (1), includes: a camera support tube (13) of which one end part (13a) is inserted into the body a camera unit (11) which joins with the support tube inside the body a camera side cable (12) which is connected to the camera unit, and is drawn out toward the outside of the body through the camera support tube a control system (3) which includes at least a display (18) and a string-like member (38) which directly or indirectly fixes the camera support tube to the body surface.
