A biometric information measurement device intermittently measures biometric information from a living body. The device includes an attachment and detachment determining section which determines whether the device is in an attached state where the device is attached to the living body or an unattached state where the device is detached from the living body, a personal identifying section which, in the attached state, determines whether a user attached with the device is a registered user who is registered in advance and stores a result of the determination, and a storage controller which, when a determination result indicating that the user is the registered user is stored, stores information indicating the registered user while being associated with the measured biometric information. The personal identifying section deletes the determination result when a time period in which the device is determined to be in the unattached state exceeds a predetermined time period.
