In order to adjust the sensitivity of an obstacle detection means and improve detection accuracy when an obstacle is actually present although the obstacle detection means detects no obstacle or when no obstacle is actually present although the obstacle detection means detects an obstacle, an autonomous travel working vehicle (1) is provided with a position calculation means for measuring the position of a vehicle body using a satellite positioning system, and a control device (30) for automatic travel and work along a set travel path. The autonomous travel working vehicle is provided with an obstacle sensor (41), an alarm means, and a false report switch (76), and if, although an obstacle has been detected and an alarm has been issued, an operator does not recognize the obstacle and activates the erroneous report switch (76), the control device (30) cancels the alarm.
