A pickup-style work vehicle comprises a driver's section, a loading floor that is located rearwardly of the driver's section and that can be moved to a dumping position, a loading floor size changeover mechanism that changes a size of the loading floor between a first state in which a front wall portion and a front bottom portion of the loading floor are moved forwardly in a fore-and-aft direction of a vehicle and a second state in which the front wall portion and the front bottom portion of the loading floor are moved rearwardly in the fore-and-aft direction, a fixing member connected to the vehicle, and partition member position change mechanism for changing the position of the partition member in the fore-and-aft direction of the vehicle between a forward position and a rearward position. The partition member when placed at the forward position is located immediately forwardly of the loading floor in the first state while the partition member when placed at the rearward position is located immediately forwardly of the loading floor in the second state.