Aerial dispersion device

In the present invention, a helicopter (30) disperses fertilizer to a field while flying. The helicopter (30) is provided with a dispersion unit (33), a fertilization amount map input unit (51), a position information acquisition unit (52), a required dispersion amount acquisition unit (54) and a metering control unit (55). Along with dispersing fertilizer, the dispersion unit (33) can change the dispersion amount per unit time. The fertilization amount map input unit (51) can input a fertilization amount map which prescribes the amount of fertilizer to be dispersed for each unit into which the field has been subdivided. The position information acquisition unit (52) acquires an own device position. The required dispersion amount acquisition unit (54) acquires, on the basis of the fertilization amount map, a required fertilizer dispersion amount at the own device position acquired by the position information acquisition unit (52). The metering control unit (55) controls, on the basis of the required dispersio