PROBLEM TO BE SOLVED: To provide a means which is excellent on removing efficiency of waste straw and dust adhering to a filter for filtering outer air.SOLUTION: In a driving section structure of a work vehicle, a dust discharging fan (27) is arranged between the filter (24) and a radiator (21), a radiator fan (26) for sucking the outer air is arranged inside the body of the radiator (21), and the dust discharging fan (27) arranged outside the body of the radiator (21) and the radiator fan (26) arranged inside the body of the radiator (21) are arranged on the same axis.