PROBLEM TO BE SOLVED: To ensure safety by preventing an unpredicted rotation of a PTO shaft caused by forgetting to operate a PTO lever, during stationary work by a stationary PTO switch operation.SOLUTION: The work vehicle, constituted so as to transmit power of an engine 5 to a PTO output shaft 10 via a PTO clutch 43 and PTO transmission devices 42, 45, comprises: engine stopping means when an operator leaves a seat for controlling to stop the engine 5 when the operator leaves an operator's seat 11； means for setting a stationary PTO mode； and a stationary PTO switch 90, and is constituted such that the PTO clutch 43 is operated to an engagement side by operating the stationary PTO switch 90 during the stationary PTO mode. The means for setting the stationary PTO mode is constituted of means for restraining stopping of the engine when the operator leaves the seat, and PTO shaft non-rotation prevention means for operating the PTO transmission devices 42, 45 to the engagement side.SELECTED DRAWING: Figure 7COPYRIGHT: (C)2019,JPO&INPIT【課題】定置ＰＴＯスイッチ操作による定置作業の際に、ＰＴＯレバー操作忘れによるＰＴＯ軸の不測の回転を防いて安全を確保する。【解決手段】エンジン５の動力をＰＴＯクラッチ４３及びＰＴＯ変速装置４２，４５を介してＰＴＯ出力軸１０に伝達すべく構成し、作業者が操縦席１１から離席するとエンジン５を停止制御する離席時エンジン停止手段と、定置ＰＴＯモードに設定する手段と、定置ＰＴＯスイッチ９０を備え、定置ＰＴＯモード中に定置ＰＴＯスイッチ９０を操作することによって、ＰＴＯクラッチ４３を入り側操作するよう構成した作業車両において、定置ＰＴＯモードの設定手段には、離席時エンジン停止を牽制する手段とＰＴＯ変速装置４２，４５を入り側とするＰＴＯ軸非回転防止手段を構成した。【選択図】図７
