An object of the present invention is to transmit a sufficient driving force to a working device. Kind Code: A1 A vehicle speed control system for controlling the vehicle speed of an agricultural work vehicle that is operated by a work device H while traveling by a travel device, wherein the agricultural work vehicle performs work travel with a non-working travel interposed therebetween, and the travel device 11 and a control unit 20 for performing tasks running control to set the vehicle speed according to the load of the power source 8 for driving the working device H, and a storage unit 21A for storing the set vehicle speed during the working travel as an optimum vehicle speed V R provided, the control unit 20, using the optimal speed V R stored in the work travel before the non-working travel, performs work travel initial control to set the speed of the working travel starting after the non-working travel. [Selection diagram] Fig. 3【課題】作業装置に十分な駆動力を伝達することを目的とする。【解決手段】走行装置１１により走行しながら作業装置Ｈにより作業を行う農作業車の車速を制御する車速制御システムであって、農作業車が非作業走行を挟んで作業走行を行い、走行装置１１および作業装置Ｈを駆動する動力源８の負荷に応じて車速を設定する作業走行制御を行う制御部２０と、作業走行の際に設定された車速を最適車速ＶＲとして記憶する記憶部２１Ａとを備え、制御部２０は、非作業走行前の作業走行で記憶された最適車速ＶＲを用いて、非作業走行後の作業走行開始時の車速を設定する作業走行初期制御を行う。【選択図】図３
