To enable route search in which a driver's own car and a scheduled operating vehicle and route guide in consideration of the operating time of the scheduled operating vehicle by adding a scheduled operating vehicle node and a scheduled operating vehicle link to a data storage device to alter a part of a route guide device.

When there are a third rod node 11 and a first scheduled operating vehicle node 13 as a guide route from a second road node 10, an operation instruction processor with scheduled operating vehicle route guide control first adds the time required for reaching from a driver's own car position 8 to a node 13 through first and second route links 15, 16 and a first road link 17 to the current time of the driver's own car position 8 to obtain the scheduled arrival time. When the time is smaller than the scheduled operating vehicle arrival time stored in the node 13, it is assumed that the scheduled operating vehicle does not reach before the driver's own car reaches the node 13, a road link 17 is selected as the next route link, and after that, a scheduled operating vehicle link 21 is selected as a guide route.