A navigation device displays predicted traffic information downloaded from a server device and statistical traffic information stored in a storage unit, on the same screen. Both information items may be displayed in such a manner that at least a part of them is overlaid (a superimposed display). The predicted traffic information may be superimposed on the statistical traffic information. When traffic information of the same time band of the same object (link, mesh area) exists in both the information items, one thereof may be selected to be displayed.