To provide a navigation system which raises user's convenience by saving time and effort to perform reservation and schedule coordination with a dealer etc.

This navigation system is provided with a navigation equipment 10 having a communication unit 2 which can communicate with dealer-side terminal equipment 3 having reservation state data 5 about the dealer's reservation state, a maintenance time determination means which determines maintenance requiring time of a vehicle, a schedule management means which manages schedule data 29 of a user, and a reservation coordination means which specifies date that can be reserved capable to perform reservation to the dealer while referring to the reservation state data 5 and the schedule data 29. When the maintenance time determination means of this navigation system determines that maintenance is necessary and the reservation coordination means specifies date that can be reserved, reservation application signal is transmitted from the communication unit 2 to the dealer-side terminal equipment 3.

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