It is Important consideration at biometrics authentication to improve convenience and reduce burden on users. In this article, we propose reduce burden on users at personal authentication method using characteristic information obtained from hand shapes. The Proposed method is less burdensome for users, because putting hands on the keyboard is routinely. Also we Compare burden on users to proposed method and other major biometrics authentication. We performed experiment of Biometric authentication with 30 male and females in their 20s, and took a questionnaire about their burden. We show the results by AHP analysis of the questionnaire.