To provide a navigation system which provides proper time information according to the movement of a user.

A present time indicated by an internal clock A41 can by altered by an ECU 4. When the user inputs a place of departure and a destination from a remote controller 6, the ECU 4 calculates an arrival time for the destination and outputs it on a touch display 5 together with the present time. Thereafter, when the user directs to alter the present time, the ECU 4 alters the present time indicated by the internal clock A41 to the appointed time, and then alters the arrival time for the destination by the time equivalent to the alteration of the present time.