PROBLEM TO BE SOLVED: To make it possible to promptly stop an autonomous running work vehicle when abnormality occurs to the autonomous running work vehicle while an operator rides in an accompanying running work vehicle 100, drives the accompanying running work vehicle side by side with the autonomous running work vehicle, and conducts work.SOLUTION: An emergency stop system is configured so that an autonomous running work vehicle 1 controlled to automatically run and work along a running route R and an accompanying running work vehicle 100 working while running to accompany the autonomous running work vehicle 1 work, an emergency stop switch 178 is disposed in the accompanying running work vehicle 100 and is connected to an engine controller 60 provided in the autonomous running work vehicle 1, and an engine 3 of the autonomous running work vehicle 1 can be stopped by operation of the emergency stop switch 178, the emergency stop switch 178 being provided on a steering wheel 104 of the accompanying running work vehicle 100.COPYRIGHT: (C)2016,JPO&INPIT【課題】自律走行作業車両に対してオペレータが随伴走行作業車両100に搭乗して併走しながら作業しているときに、自律走行作業車両に異常が生じたときに、自律走行作業車両を速やかに停止できるようにする。【解決手段】走行経路Rに沿って自動的に走行及び作業を行うように制御された自律走行作業車両1と、該自律走行作業車両1に随伴走行しながら作業を行う随伴走行作業車両100とにより作業を行い、随伴走行作業車両100には緊急停止スイッチ178が配置されて自律走行作業車両1に設けたエンジンコントローラ60と接続されて、緊急停止スイッチ178の操作により自律走行作業車両1のエンジン3を停止可能に構成し、緊急停止スイッチ178は随伴走行作業車両100のステアリングハンドル104に設けられる。【選択図】図4