The present invention addresses the problem of achieving smooth train operation using an interlocking device for controlling the course of a train. An interlocking device for controlling the course of a train on the basis of the current line position information for the train, first timetable information (main line timetable information) which is timetable information for a train traveling between stations, and second timetable information (line entrance/departure timetable information) which is timetable information for a train moving inside a station, wherein the order in which course control is performed differs according to whether or not a prescribed condition is satisfied.