To provide a system, capable of more efficiently updating map information by reducing manpower and labor and sharing information.

In this map maintenance system for updating the map information, a map manager 1 transmits a confirmation request to a confirmer 6 to check map change information received from an information provider 2 and updates the map information stored in a map database, on the basis of the map change information determined as being correct, as the confirmation results of the confirmer 6. Thus, it is possible to construct the division system of labor among the information provider, the map manager and the confirmer through a communication line and to realize efficient map update work.