An in-vivo monitoring camera system includes an image capturing portion (camera unit 11) that is capable of being introduced into a body, a support tube (13) that has a connection portion (trocar connection portion 13x) with a tubular tool (trocar 31) which is capable of being introduced into the body on one end side and has a joining portion (protrusion type joining portion 13y) to the image capturing portion on another end side, a cable (camera-side cable 12) that is connected with the image capturing portion and passes through the support tube, and a control system that is electrically connected with the cable and includes at least a display device (18).
