To continuously convert user's favorite place name data without troublesome operation to set the layer and the position of his or her favorite plane name data at each time in the case of conversion and display of place name data.

This device is provided with a position information read means which reads absolute position information of at least latitude and longitude, a place name conversion means which divides absolute position information into plural layers with a prescribed resolution based on a place name data table to convert then as place name data, a display means which displays these plural layers in a prescribed order as place name data, and layer order setting means (#113, #114, and #115) which store the order of layers of place name data after the change in a storage means in the case of the change operation of the order of layers of place name data on the display means and sets this stored order as that for next display of place name data on the display means.