According to a remote operation support system, a physician present in a remote place can view endoscopic images displayed in an operating room over a communication line, and change an image area or a viewing direction represented by endoscopic images in a desired manner by performing manipulations. The physician present in the remote place can thus support an operator present in the operating room. An endoscope system installed in the operating room and a remote control system installed in a control room located in the remote place are linked using a public communication line. The endoscope system has a signal transmission apparatus installed in the operating room. The signal transmission apparatus in the operating room converts a video signal and a control signal or patient data, which are produced by a CCU and a system controller respectively, and outputs resultant signals over the public line. The remote control system has a signal transmission apparatus installed in the control room. The signal transmission apparatus in the control room is connected on the public line and converts the transmitted signals into the original signals. A second monitor and a remote controller are connected to the transmission apparatus.