PROBLEM TO BE SOLVED: To provide a traveling speed control device for a work vehicle capable of making the maximum vehicle speed of a plurality of work vehicles uniform. SOLUTION: A hydraulic transmission 2 for driving a traveling device, a cylinder 3 for shifting the output rotation speed of the hydraulic transmission according to an oil supply flow rate, and an oil supply flow rate to the cylinder based on an operation of a transmission lever. In a work vehicle equipped with a solenoid valve 5 for changing the speed, when the speed change lever is operated to the speed increasing side, the opening of the solenoid valve is increased to increase the vehicle speed, and when this vehicle speed exceeds the set speed. , Provide a control device that gradually reduces the opening of the solenoid valve to converge the vehicle speed to the set speed. In addition, a maximum vehicle speed setting operating tool for setting the upper limit opening of the solenoid valve is provided. [Selection diagram] Fig. 5【課題】複数の作業車両の最高車速を均一化できる作業車両の走行速度制御装置を提供する。【解決手段】走行装置を駆動する油圧式変速装置２と、送油流量に応じて油圧式変速装置の出力回転速度を変速させるシリンダ３と、変速レバーの操作に基づいてシリンダへの送油流量を変更する電磁バルブ５を備えた作業車両において、変速レバーが増速側へ操作された場合に電磁バルブの開度を増加させて車速を増速し、この車速が設定速度を超えた場合に、電磁バルブの開度を徐々に減少させて車速を設定速度に収束させる制御装置を設ける。また、電磁バルブの上限開度を設定する最高車速設定操作具を設ける。【選択図】図５
