The objective of the present invention is to enable the display at a remote operation device of information such as the work state and travel state of an autonomous travel work vehicle, thus enabling the apprehension of the state of the autonomous travel work vehicle. An autonomous travel work vehicle (1), which is provided with a position calculation means that measures the device body position, a steering actuator (40), an engine rotation control means, a transmission means (44), and a control device (30) that controls each of same, is caused to work, while autonomously travelling along a set travel path stored in the control device (30), by an accompanying travel work vehicle (100) that works while accompanying the travel of the autonomous travel work vehicle (1) by means of attended operation and that is mounted with a remote operation device (112) that operates the autonomous travel work vehicle. The remote operation device (112) is portable, is removably attached to the accompanying travel work vehicle, and is provided with a display (113) that displays the state of a work machine, the state of the engine, and the state of travel of the autonomous travel work vehicle.Cette invention a pour objet de permettre laffichage, sur un dispositif dactionnement à distance, dinformations telles que létat de fonctionnement et létat de déplacement dun engin de manœuvre sans conducteur, permettant ainsi dappréhender létat de lengin de manœuvre sans conducteur. Plus précisément, linvention concerne un engin de manœuvre sans conducteur (1), comprenant des moyens de calcul de position qui mesurent la position du corps de dispositif, un actionneur de direction (40), des moyens de commande de rotation du moteur, des moyens de transmission (44), et un dispositif de commande (30) qui commande chacun de ceux-ci. Ledit engin de manœuvre sans conducteur est amené à fonctionner tout en se déplaçant sans conducteur le long dun trajet de déplacement déterminé enregistré dans le disposit
