To prevent 'substitutive recording', with which a person except for an operator himself illegally registers the time of attending/leaving the office.

Concerning the time recorder, with which date/time information at the time point is registered corresponding to identification information capable of identifying the operator when the operator executes prescribed operation, this device is provided with a storage means 28 capable of electrically storing the date/time information and the identification information and an operator confirming means 10 for specifying a relevant individual out of previously registered persons and the identification information of that registered person on the basis of the physical information of the operator.