A fingerprint collating device and a fingerprint collating method which can prevent an illicit use of fingerprint. The fingerprint collating device includes fingerprint reader for reading a user's fingerprint to create read fingerprint information, and to create read history information indicating that the read fingerprint information has been created, read history storage for storing the read history information, and collator for collating the read fingerprint information with the registered fingerprint information to effect personal authentication and output a result of authentication when the read history information is stored in the read history storage.