To specify areas of high frequency of use on the basis of relative frequency of use for every area and retrieve facilities on the basis of the areas.

The navigation device comprises a storage means for storing history information on the use of maps by an operator, a use frequency computing means for computing the ratio of the history information on every area to history information within a predetermined period, and an area specifying means for specifying the areas on the basis of the results of computations of the use frequency computing means.