PROBLEM TO BE SOLVED: To perform efficient work, by reducing labor in a worker for performing agricultural work by operating an agricultural work machine, by arranging a steering control device of automatic control for controlling so as to automatically straightly advance even if there is a recess-projecting in a field, without arranging a communication apparatus such as a transmitter and a receiver.SOLUTION: This automatic steering control device of the agricultural work machine is characterized by controlling the steering control device to be corrected in a straight advance when an advance direction detecting means detects the fact of being dislocated from the straight advance, by arranging the steering control device for steering a traveling device and the advancing direction detecting means for detecting the advancing direction of a machine body, in the machine body.COPYRIGHT: (C)2010,JPO&INPIT【課題】本発明では、発信機と受信機等の通信機器を設けることなく、圃場に凹凸が有っても自動的に直進走行になるように制御する自動制御の操向制御装置を設けることで、農作業機を運転して農作業を行う作業者の労力を軽減し効率的作業を行えるようにすることが課題である。【解決手段】走行装置を操向する操向制御装置と機体の進行方向を検出する進行方向検出手段を機体に設け、該進行方向検出手段が直進からずれたことを検出すると操向制御装置を直進に修正すべく制御したことを特徴とする農作業機の自動操向制御装置とした。【選択図】図10