The present invention relates to a pesticide spraying device adapted for use in a speed sprayer, which is mounted on the speed sprayer to spray pesticide through a spray body (100) comprising: a supply tube for speed sprayer (110) and two supply containers (120, 120&prime) joined in both directions to the outer surface of the supply tube (110). Specifically, the pesticide spraying device of the present invention comprises: a first spray nozzle (200) which includes a nozzle main body (220) and a first cap (230), wherein the nozzle main body (220) is separably joined to one supply container (120), and the first cap (230) is joined so as to allow one end portion of the nozzle main body (220) to be inserted therein and includes a spray hole (236) formed at an upper side thereof and a second spray nozzle (300) which includes a nozzle core (320) and a second cap (330), wherein the second spray nozzle (300) is inserted in the other supply container (120&prime) and has a second outflow groove (322) formed in the shape of a spiral on an outer circumference thereof, and the second cap (330) is screwed to the supply container (120&prime) and has a second spray hole (332) formed at an upper side thereof. More specifically, the nozzle main body (220) comprises: a coupling unit (222) which is separably screwed to the one supply container (120) a connection unit (224) which is extended to protrude from an upper surface of the coupling unit (222) and has a rubber ring (225) coupled to the outside thereof and a nozzle unit (226) which is connected to an end portion of the connection unit (224), wherein the first cap (230) is screwed to the connection unit (224) so as to allow the nozzle unit (226) to be inserted therein.COPYRIGHT KIPO 2017상기 목적을 달성하기 위한 본 발명에 따른 스피드 스프레이어용 공급관(110)과 상기 공급관(110)의 외면에 양방향으로 결합되는 두 개의 공급통(120,120`)으로 이루어진 분사본체(100)를 통하여 농약을 분사하도록 스피드 스프레이어에 장착되는 스피드 스프레이어용 농약분사장치에 있어서, 상기 하나의 공급통(120)과 상호 분리 가능하게 결합되는 노즐본체(220)와, 상기 노즐본체(220)의 일단부가 삽입되도록 결합되며 상측에 분사구멍(
