In the maritime society, the training of a ship handling is carried out by a ship bridge simulator. The education using the simulator is popular worldwide because we are able to educate the same scenario, and repeat it for a lot of students until they can understand well. Moreover, we can make a scenario for the dangerous conditions and situations that we have never tried on the real vessel. The evaluation of simulator training is subjectively; it is professional subjective evaluation that comes from their experiences. In this paper, we propose a real time evaluation support system using a physiological index as the one of system of simulator systems. The system evaluates mental workload on the real time, and the system supports instructors to monitor student's mental workload during their training. The instructors understand not only their performance but also their mental workload to evaluate the training.