A navigation apparatus, comprising: front side image display means for displaying an image of a front side and back side image display means for displaying an image of a back side, each image being one of images which stereoscopically overlap along a line of sight; measuring means for measuring a current position of an own vehicle; map storage means for storing map data which includes information indicating whether or not a feature is an elevated road and data of an image of a road; and control means for controlling each means, wherein the control means reads the map data of a predetermined area, where the current position of the own vehicle is included, from the map storage means, based on the current position of the own vehicle measured by the measuring means; wherein the control means determines whether or not the elevated road exists in the predetermined area, based on information indicating whether or not the feature, which is registered as the map data, is the elevated road, and wherein when the control means determines that the elevated road exists in the predetermined area, the control means determines whether or not the current position of the own vehicle is on the elevated road, based on the current position of the own vehicle measured by the measuring means, characterized in that when the control means determines that the current position of the own vehicle is not on the elevated road, the back side image display means displays the current position of the own vehicle on the back side image display means and the front side image display means draws an image of the elevated road so that an image drawn on the back side image display means can be visually percepted, and further characterized in that when the control means determines that the current position of the own vehicle is on the elevated road, the control means inserts an image of the elevated road included in the map data into a front side image signal for displaying the image of the front side; the control means transmits the front side image signal to the front side image display means; and the front side image display means displays the current position of the own vehicle on the elevated road. front side image display means for displaying an image of a front side and back side image display means for displaying an image of a back side, each image being one of images which stereoscopically overlap along a line of sight; measuring means for measuring a current position of an own vehicle; map storage means for storing map data which includes information indicating whether or not a feature is an elevated road and data of an image of a road; and control means for controlling each means, wherein the control means reads the map data of a predetermined area, where the current position of the own vehicle is included, from the map storage means, based on the current position of the own vehicle measured by the measuring means; wherein the control means determines whether or not the elevated road exists in the predetermined area, based on information indicating whether or not the feature, which is registered as the map data, is the elevated road, and wherein when the control means determines that the elevated road exists in the predetermined area, the control means determines whether or not the current position of the own vehicle is on the elevated road, based on the current position of the own vehicle measured by the measuring means, characterized in that when the control means determines that the current position of the own vehicle is not on the elevated road, the back side image display means displays the current position of the own vehicle on the back side image display means and the front side image display means draws an image of the elevated road so that an image drawn on the back side image display means can be visually percepted, and further characterized in that when the control means determines that the current position of the own vehicle is on the elevated road, the control means inserts an image of the elevated road included in the map data into a front side image signal for displaying the image of the front side; the control means transmits the front side image signal to the front side image display means; and the front side image display means displays the current position of the own vehicle on the elevated road.