To accurately score the degree of safe driving even when a road state is changing.

A control part 4 maps the reference values of the operations of a vehicle based on road map information pre-stored in a storage medium 2, corrects it based on realtime information 3 showing the present road state, scores the degree of the safe driving by comparing the corrected reference values with vehicle operation information detected by various sensors 5, and outputs the scored results to a display part 6 and a voice output part 7.