[Problem] To enable the displaying, at the display of a remote operation device, of information such as the travel state and work state of an autonomous travel work vehicle, thus enabling the easy apprehending of the state of the autonomous travel work vehicle. [Solution] In a parallel travel work system, an autonomous travel work vehicle (1), which is provided with a position calculation means that measures the device body position by means of a satellite positioning system, a steering actuator (40) that operates a steering device, an engine rotation control means, a transmission means (44), and a control device (30) that controls each of same, is caused to autonomously travel 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 can operate the autonomous travel work vehicle (1). The remote operation device (112) is portable and is removably attached to the accompanying travel work vehicle (100), and the travel state, engine state, and work machine state of the autonomous travel work vehicle (1) can be displayed at a display (113) provided to the remote operation device (112).
