Abstract: The invention relates to a method and a device for monitoring the drowsiness of drivers of moving objects, such as vehicles, aeroplanes, trains, and ships. According to said method, several physiological measurement variables such as e.g. blinking frequency, eyelid pulse frequency, yawning frequency or the state of face muscle relaxation are combined into a summation signal with a differentiated weighting, said signal constituting a final state signal, which indicates the drowsiness with the logic states 0 (zero/e.g. no drowsiness established) or 1 (one/e.g. drowsiness established).