To enable stabilization of a steering posture during autonomous steering and quick stop of traveling when an obstacle exists along a target travel route in a working machine in which autonomous steering is canceled when a rotational torque exceeding a predetermined value is applied to a steering wheel.SOLUTION: A working machine in accordance with the present invention includes: a holding member capable of being held by an operator who is seated on an operators seat and an emergency stop switch provided on the holding member for stopping the power transmission to driving wheels in response to a manual operation. Preferably, the emergency stop switch is disposed within an area above the seat surface of the operators seat in terms of a vertical direction, ahead of the back of the operators seat in terms of a front-back direction, and behind the steering wheel.SELECTED DRAWING: Figure 4【課題】操向ステアリングに所定値を越える回転トルクが付加されると自動操舵が解除される作業機において、自動操舵時の操縦姿勢安定化を図りつつ、目標走行経路上に障害物が存在する場合等の際に迅速に走行停止を行える作業機を提供する。【解決手段】本発明に係る作業機は、操縦席に着座した状態の操縦者が把持可能な把持部材と、前記把持部材に設けられ、人為操作に応じて駆動輪への動力伝達を停止させる緊急停止スイッチとを備える。好ましくは、緊急停止スイッチは、上下方向に関し操縦席の座面より上方で、前後方向に関し操縦席の背面より前方且つ操向ステアリングより後方の領域内に配置される。【選択図】図4
