Abstract: A method and system for monitoring a state of consciousness of an operator in an aircraft cockpit includes at least one image acquisition module for acquiring images of the operator, a detection module for detecting movements of the body of the operator from the images, a determination module for determining a movement feature of the body of the operator during at least one time proportion of a predetermined time window, a transmission module for transmitting a signal representative of a state of loss of consciousness of the operator to a user device. The transmission module is implemented if the movement feature meets a predetermined condition. The state of consciousness of the operator is thus monitored automatically in order to supplement the monitoring by the flight crew members.