To provide a vehicle for spraying chemicals capable of smoothly discharging hot air in an engine room.

A radiator 27 is arranged toward the oblique inside front side from the machine body side. Air after heat exchanged in the radiator 27 is blown successively to an engine 5 and a muffler 41. The outer periphery of a jetting head plate peripheral edge part 45b is in a negative pressure state with the high speed air flow by a blower 6. Then, hot air in the engine room 3 is easily discharged from a passing port 51 by the ejector effect generated with the negative pressure. Cooled air from an outside air suction passage 31 is sucked acceleratingly by the ejector effect.