Field operation machine

A field work machine is provided with: an obstacle detection means (70) for detecting obstacles including ridges; a body position calculation unit (52) that calculates the body position; a travel control unit (6) that causes the machine body to travel automatically or manually; a recognition unit (54) that recognizes a specific recognition object registered in advance; and an obstacle management unit (55) that manages the approaching prohibited distance of the machine body to the obstacle detected by the obstacle detection means (70) or the approaching time of the machine body to the obstacle. The specific recognition object is registered in advance as a symbol that allows the machine body to approach the obstacle, and when the obstacle is the specific recognition object or when the specific recognition object is recognized in the vicinity of the obstacle, the obstacle management unit (55) shortens the approach prohibition distance or prolongs the time for the machine body to approach the obstacle. 田地作业机具备：障碍