It is generally quite difficult to apply the current usability evaluation methods to the interface for the biometric identification, because the operation time of the biometric identification is too short to analyze. In the current study, we conducted the interview research on the biometrics. From the results of the interview research, it was clarified that 71% users have an experience of continuous error while in use of the biometric identification. So, we conducted the evaluation experiments for continuous error of the fingerprint identification. In the experiment, the unsatisfaction which is one of the usability is evaluated from the aspect of the mental stress during the continuous error of fingerprint identification. Based on the results of the evaluation experiment, we can show a guideline that when the continuous error occurs X times, the fingerprint identification system should be changed to another identification method to avoid an increase in the user’s unsatisfaction.