PROBLEM TO BE SOLVED: To provide an automatic travel work vehicle capable of changing an obstacle detection region for an obstacle sensor as occasion may demand, according to states of a work device and a vehicle body.SOLUTION: An automatic travel work vehicle which travels and performs work along a travel route comprises: a work travel control part 50 for controlling work travel； a work travel state detection sensor group 80 for detecting a work travel state； one or more obstacle sensors for detecting an obstacle which is an obstacle for travel； an obstacle detection part 43 for detecting an obstacle which exists in the obstacle detection region based on a sensor signal from the obstacle sensor(s)； and an obstacle detection region determination part 41 for determining the obstacle detection region based on the work travel state detected by the work travel state detection sensor group 80.SELECTED DRAWING: Figure 4【課題】作業装置の状態や車体の状態に応じて、臨機応変に障害物センサのための障害物検出領域を変更させる自動走行作業車が要望されている。【解決手段】走行経路に沿って作業走行する自動走行作業車は、作業走行を制御する作業走行制御部５０と、作業走行状態を検出する作業走行状態検出センサ群８０と、走行の障害となる障害物を検出する１つ以上の障害物センサと、障害物センサからのセンサ信号に基づいて障害物検出領域内に存在する障害物を検出する障害物検出部４３と、作業走行状態検出センサ群８０によって検出された作業走行状態に基づいて障害物検出領域を決定する障害物検出領域決定部４１とを備えている。【選択図】図４
