PROBLEM TO BE SOLVED: To allow a work vehicle to surely avoid coming in contact with an obstacle during its automatic operation.SOLUTION: A work vehicle comprises an electronic control system for vehicle automatic operation in which a vehicle is automatically operated. The electronic control system includes: front and rear obstacle search instruments 65 for detecting an approach of an obstacle and a contact avoidance control unit for performing contact avoidance control for avoiding coming into contact with the obstacle when the approach of the obstacle is detected by the obstacle search instruments 65. The front obstacle search instrument 65 of the front and rear obstacle search instruments 65 is arranged on an upper part of the front of the vehicle, and the rear obstacle search instrument 65 is arranged on an upper part of the rear of the vehicle. At least one of the front and rear obstacle search instruments 65 is arranged to be in a laterally center part of the vehicle.SELECTED DRAWING: Figure 2【課題】自動運転中に作業車が障害物に接触する虞をより確実に回避できるようにする。【解決手段】作業車は、車体を自動で運転する自動運転用の電子制御システムを備え、電子制御システムは、障害物の接近を検出する前後の障害物探知器65と、障害物探知器65が障害物の接近を検出したときに障害物との接触を回避する接触回避制御を行う接触回避制御部とを備え、前後の障害物探知器65は、前側の障害物探知器65が車体前部の上部に配置され、かつ、後側の障害物探知器65が車体後部の上部に配置されるとともに、少なくとも前後いずれか一方の障害物探知器65が車体の左右中央箇所に配置されている。【選択図】図2
