Work vehicle includes a traveling device. A speed changing device speed-changes a driving force of the engine and transmits the speed-changed force to the traveling device. A belt transmission mechanism transmits the driving force of the engine to the speed changing device. A belt tension clutch switches over the belt transmission mechanism between a transmitting state and a non-transmitting state. A brake operating tool effects a braking operation of the traveling device. A coupling mechanism activates the belt tension clutch.
