To provide a mobile body tracking processing device capable of presenting the position of a mobile body, without mounting a positioning device or the like on the mobile body.

The mobile body tracking process device includes passage time acquiring means 121, 113 for acquiring point passage time information, indicating the time the mobile body passes a point on a course; a passage-recording means 113 for recording the point passage time information in a result database, each time the point passage time information is acquired, in such a manner as to associate the information with the point that the mobile body has passed; and anticipated position computing means 112, 111 for creating anticipated position information, by computing the anticipated position of the mobile body on the course, after the latest point has passed.