[Problem] The problem is to provide a route generation method, a route generation system, and a route generation program capable of causing a work vehicle to travel autonomously in an appropriate manner even in a case where the orientation of a target route including a plurality of straight routes is changed.
[Solution] The generation processing part 713 generates the target route R including a plurality of straight routes arranged at equal interval spacing W1, based on the reference line L1 which passes through point A and point B in the field F. In a case of changing the orientation of the target route R, the change processing part 714 maintains the interval spacing W1 of each of the plurality of straight routes.