To provide a navigation system having the function capable of easily grasping the display state of a traveling distance meter such as an odometer.

When the traveling distance displayed on an odometer is inputted (S10), and the announcement desired distance that is the traveling distance the announcement of which a driver desires is inputted, an announcement distance shorter than the announcement desired distance by a correction distance is set (S12). A traveling distance calculation processing for calculating the traveling distance is performed (S14), and it is judged whether the integrated traveling distance is equal to or larger than the announcement distance or not (S16). It is announced by voice that the traveling distance is conformed to the announcement distance (S18). Accordingly, since it is announced that the distance display of the odometer is close to the announcement desired distance when this navigation system is used, the driver's attention can be prevented from being given to the odometer until the announcement is given.