BOOM SPRAYER

PROBLEM TO BE SOLVED: To provide a boom sprayer that can make appropriate selection of angle adjusters for a boom according to the driving surface condition of a farm field or the work situation so that the tilt angle of the boom is properly adjusted for the occasion.SOLUTION: The boom sprayer 1 is provided for spraying a field with a chemical agent. The boom sprayer 1 includes: a base frame 2 fixed to a traveling device which travels on the field; a chemical spray 3 with a plurality of spray nozzles 31 for spraying the chemical agent; a boom 4 in which the spray nozzles 31 are separately arranged in the longitudinal direction; a boom support arm 5 swingably supported on the base frame 2 at an upper fulcrum point 51 provided at the upper end thereof, and for turnably supporting the boom 4 about the gravity center and at a lower fulcrum point 52 provided at the lower end thereof; and a boom angle adjuster 6 for arbitrarily adjusting the tilt angle of the boom 4 with respect to the boom support arm 5.