To provide a flight course control system for an unmanned aircraft for generating a flight course along which chemicals are dispersed and performing control for making the unmanned aircraft fly according to the flight course.SOLUTION: A flight course control system for an unmanned aircraft is a system for generating a spatial flight course in a three-dimensional space as a course for dispersing chemicals in a cultivation area of the unmanned aircraft when dispersing the chemicals over the cultivation area in a farm field by using the unmanned aircraft, and controlling flight of the unmanned aircraft in the spatial flight course. The system comprises: a flight course generation server for generating the spatial flight course of the unmanned aircraft in the three-dimensional space included inside of a cultivation area boundary that is an outer periphery of the cultivation area in a case of projection to a two-dimensional planar map of the farm field； and a flight control server for controlling the unmanned aircraft in such a manner that a flight position is along a two-dimensional course projected on the two-dimensional planar map, without deviating the flight position outside of the cultivation area boundary in a case where the flight position of the unmanned aircraft is projected on the two-dimensional planar map.SELECTED DRAWING: Figure 1【課題】薬剤の散布を行う飛行経路を生成し、この飛行経路に基づいて無人飛行体を飛行させる制御を行う無人飛行機の飛行経路制御システムを提供する。【解決手段】本発明の無人飛行機の飛行経路制御システムは、圃場における耕作地に薬剤を無人飛行体を用いて散布する際、当該無人飛行体の耕作地における散布する経路として、３次元空間における空間飛行経路を生成し、当該空間飛行経路における無人飛行体の飛行を制御するシステムであり、圃場の２次元平面地図に対して投影した際、耕作地の外周である耕作地境界の内部に含まれる、３次元空間における無人飛行体の空間飛行経路を生成する飛行経路生成サーバと、無人飛行体の飛行位置を２次元平面地図に投影した際、耕作地境界外に飛行位置を逸脱させず、飛行位置が空間飛行経路を２次元平面地図に投影した２次元経路に沿うように無人飛行体を制御する飛行制御サーバとを備える。【選択図】図１
