A navigation system comprising: present-position detecting means for detecting a present position of a vehicle; input means for entering a destination and information necessary for a route search; information storage means for storing data necessary for a route search, said data including branch-point image data and road data including node data; display means for displaying route guidance information; route search means for searching for a route to the destination on a basis of the information entered by said input means and the data stored in said information storage means; and control means for reading said branch-point image data when the vehicle is within a predetermined distance from a branch point on a route found by said route search means and for outputting said branch-point image data to said display means, and said display means is arranged to display a two-part split screen, and to display the searched route on a map prepared from said node data in a first part of the two-part split screen, characterized in that said display means is arranged to display an image based on the branch-point image data in a second part of the two-part split screen, said branch-point image data comprise coordinates added thereto between a point in the lower part of the image data and a branch point, such as an intersection, wherein the coordinates added to said branch-point image data comprise some points on a route in form of coordinates with respect to a coordinate point of the image data, and the control means is arranged to superimpose a present-position mark on said branch-point image data on a basis of coordinates of the present position detected by said present-position detecting means and the coordinates added to said branch-point image data. present-position detecting means for detecting a present position of a vehicle; input means for entering a destination and information necessary for a route search; information storage means for storing data necessary for a route search, said data including branch-point image data and road data including node data; display means for displaying route guidance information; route search means for searching for a route to the destination on a basis of the information entered by said input means and the data stored in said information storage means; and control means for reading said branch-point image data when the vehicle is within a predetermined distance from a branch point on a route found by said route search means and for outputting said branch-point image data to said display means, and said display means is arranged to display a two-part split screen, and to display the searched route on a map prepared from said node data in a first part of the two-part split screen, characterized in that said display means is arranged to display an image based on the branch-point image data in a second part of the two-part split screen, said branch-point image data comprise coordinates added thereto between a point in the lower part of the image data and a branch point, such as an intersection, wherein the coordinates added to said branch-point image data comprise some points on a route in form of coordinates with respect to a coordinate point of the image data, and the control means is arranged to superimpose a present-position mark on said branch-point image data on a basis of coordinates of the present position detected by said present-position detecting means and the coordinates added to said branch-point image data.