PROBLEM TO BE SOLVED: To suitably control switching of a work machine between working state and non-working state.SOLUTION: An instruction output part 33 of a tractor 1 outputs a working instruction for controlling a work machine 3 in a working state and a non-working instruction for controlling the work machine 3 in a non-working state. A work margin distance storage 54 sets a switch target position at which a switching control of the working state of the work machine 3 by a work machine controlling part 34 is implemented. A vehicle speed controlling part 35 switches a vehicle speed of the tractor 1 from a working vehicle speed to a non-working vehicle speed according to the non-working instruction, and switches from the non-working vehicle speed to the working vehicle speed according to the working instruction. A remaining distance obtaining part 37 obtains a remaining distance from a work center position of the work machine 3 to the switch target position. The instruction output part 33 controls an output timing of the non-working instruction based on the working vehicle speed and the remaining distance. Also, the instruction output part 33 controls an output timing of the working instruction based on the non-working vehicle speed, a speed change rate from the non-working vehicle speed to the working vehicle speed, and the remaining distance.SELECTED DRAWING: Figure 4【課題】作業機の作業状態と非作業状態とを良好に切換制御する。【解決手段】トラクタ１の指令出力部３３は、作業機３を作業状態に制御する作業指令及び非作業状態に制御する非作業指令を出力する。作業マージン距離記憶部５４は、作業機制御部３４による作業機３の作業状態の切換制御が実行される切換目標位置を設定する。車速制御部３５は、非作業指令に応じてトラクタ１の車速を作業時の車速から非作業時の車速に切り換えるとともに、作業指令に応じて非作業時の車速から作業時の車速に切り換える。残存距離取得部３７は、作業機３の作業中心位置から切換目標位置までの残存距離を取得する。指令出力部３３は、作業時の車速と、残存距離と、に基づいて非作業指令の出力タイミングを制御する。また、指令出力部３３は、非作業時の車速と、非作業時の車速から作業時の車速への速度変化率と、残存距離と、に基づいて、作業指令の出力タイミングを制御する。【選択図】図４
