A curving control device to which an electrically-controlled endoscope is connected has a main CPU for primarily performing curving driving control, and a monitoring CPU for monitoring whether the operating state relating to curving actions is normal or abnormal. In the event of detecting an abnormality from the monitoring CPU, the curving control device also performs processing for handling the occurrence of the abnormality, such as outputting an emergency stop through an interlock via the main CPU, turning the main power and the like of a servo driver OFF, and so forth.