A method of evaluating a driving skill executed by a computer, including the method: a skill assessment step (S05, S06, S12) consisting of evaluating a driving skill of a driver based on a detection value (D3) , D4) of a vehicle state; and a component separation step (S04) consisting of separating the detection value (D3, D4) from the vehicle state in a conductor operation component that reflects a conductor movement and a non-conductor operation component without reflecting the driver movement, characterized by a step (S22) of determining whether or not the evaluation of the driving skill is to be modified, the determination being based on at least a quantity of the driver operating component; and a skill assessment modification step (S23) which consists of correcting or abandoning the evaluation of the driving skill when it is determined that the evaluation of the driving skill has to be modified.
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