The purpose of the present invention is to provide a work vehicle that does not slip. The work vehicle has an engine (10) generating a rotational power, a hydraulic stepless transmission (HST) (20) having a hydraulic pump (22) and a hydraulic motor (24) and changing the speed of rotation generated by the engine (10) and transmitting it to drive wheels (40), an actuator (73) for adjusting the transmission ratio of the HST (20) by changing the tilt angle of a movable swash plate (22a) of the hydraulic pump (22), a shift lever (speed setting means) (50) for setting the speed of a motor output shaft (25) changed by the HST (20), and a control device (60) for controlling operation of the actuator (73) so that the speed of the motor output shaft (25) changed by the HST (20) changes at a predetermined rate of change (β) until it reaches the speed (preset speed) set by the shift lever (50).