To provide a wirelessly operated liquid agrochemical sprayer, equipped with an engine-driven propeller, ladder and liquid agrochemical tank on the base, which can be easily handled to securely spray the liquid agrochemical.

This sprayer, equipped with a propeller 6 driven by an engine 5, rudder 9 and liquid agrochemical tank 3 on the base, is operated wirelessly by the aid of a transmitter and receiver. A pump 16 is provided in the line that connects the liquid agrochemical tank 3 to a liquid agrochemical release port 23A in the base at the rear. A handle 7 is provided on the base, oriented in the longitudinal direction. The liquid agrochemical A can be securely sprayed by the pump 16. The sprayer can be easily floated on a field or the like, or lifted for removal using the handle 7, needing no crouching works by the operator. It can be operated relatively easily by manipulating the transmitter with left and right fingers for the rudder and engine/pump controllers.