To perform diagnosis and evaluation of a driving ability corresponding to individual vehicle drivers.

This driver risk computing system comprises a risk recognition characteristics structuring system 12A for storing risk characteristics of individual vehicle drivers, a risk recognition characteristics analyzing means 52A connected with the risk recognition characteristics structuring system 12A, and a driving ability diagnosis and evaluation result displaying means 54 of displaying at least either of a diagnosis result or an evaluation result of driving ability. The risk recognition characteristics analyzing means 52A inputs risk recognition characteristics of the vehicle driver, computes maximum or minimum value of scores of respective arbitrary risk factors and risk standards or differences in scores or ratios of respective arbitrary risk factors and risk standards, and outputs the computed result to a driving ability diagnosis and evaluation result displaying means 54 as driving ability data. The driving ability diagnosis and evaluation result displaying means 54 displays the inputted driving ability data. The driving ability of a driver can be diagnosed from this displayed driving ability data.