The present invention requires at least one of an electroencephalogram for measuring electrical signals generated in the brain and an electrocardiogram for measuring electrical signals generated from the heart, and extracting features from the signal waveforms output from the electroencephalogram and the electrocardiometer. A feature extraction unit for digital conversion, a registration unit for storing and registering the extracted characteristics in association with user information, and a comparison unit for comparing at least one of the ECG and EEG characteristics of the authentication requester with the characteristics stored by the registration unit; Provided is a personal authentication device including an authentication processing unit that determines whether to authenticate according to the comparison result of the comparison unit and proceeds with a follow-up action.
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