To provide a work vehicle that can reliably avoid obstacle collision regardless of whether selecting a laser radar or an ultrasonic sensor of a vehicle equipped with the same for obstacle detection.SOLUTION: A work vehicle is comprised of: a first obstacle detection unit that detects an obstacle by using a laser radar unit； a second obstacle detection unit that detects an obstacle by using an ultrasonic sensor unit； a measurement environment determination unit for determining a quality of a measurement environment of the laser radar unit； a vehicle speed management unit that manages a first vehicle speed capable of stopping the vehicle body in front of the obstacle in response to the obstacle detection by the first obstacle detection unit, and a second vehicle speed that is slower than the first vehicle speed, which is capable of stopping the vehicle body in front of the obstacle in response to the obstacle detection by the second obstacle detection unit； and a travel control unit that travels the vehicle body at the second vehicle speed when a measurement environment failure is determined while the vehicle body is traveling at the first vehicle speed.SELECTED DRAWING: Figure 4【課題】障害物検出のためにレーザレーダと超音波センサとを備えた車両において、どちらを選択しても確実な障害物衝突回避が可能となる作業車の提供。【解決手段】作業車は、レーザレーダユニットを用いて障害物を検知する第１障害物検知部と、超音波センサユニットを用いて障害物を検知する第２障害物検知部と、レーザレーダユニットの計測環境の良否を判定する計測環境判定部と、第１障害物検知部による障害物検知に応答して車体を障害物の手前で停止させることが可能な第１車速と、第２障害物検知部による障害物検知に応答して車体を障害物の手前で停止させることが可能で、第１車速より遅い第２車速とを管理する車速管理部と、第１車速で前記車体を走行させている間に計測環境の不良が判定されると、第２車速で車体を走行させる走行制御部とを備える。【選択図】図４
