The present invention relates to a spraying device for chemicals, comprising: a supply pipe installed to slide in front and rear directions in a facility having a vegetation place in which plants grow therein, and receiving chemicals from a chemical supply unit an injection nozzle installed in the supply pipe and spraying chemicals, supplied from the supply pipe, to the plants and a transfer unit installed in the facility and moving the supply pipe in front and rear directions to extend a spray range of chemicals sprayed from the injection nozzle. The transfer unit comprises: a main body to slide in front and rear directions in the facility by the guide unit a rack gear fixed on any one of the facility or the main body, and having a plurality of gears along front and rear directions a pinion gear installed to be rotatable on the other of the facility or the main body to be interlocked with the rack gear a driving unit installed in the pinion gear to rotate the pinion gear and a pipe support unit installed in the main body, and supporting the supply pipe so that the supply pipe moves with the main body. According to the present invention, as the supply pipe having a plurality of injection nozzles moves in front and rear directions, the spraying device for chemicals prevents chemicals from being excessively supplied to a specific position, and can uniformly spray drugs in a greenhouse. Specifically, the transfer unit of moving the supply pipe in front and rear directions has the rack gear and the pinion gear, not hydraulic pressure, thereby regularly setting stroke length of the supply pipe without an extra adjusting operation.COPYRIGHT KIPO 2016본 발명은 약제살포장치에 관한 것으로서, 내부에 식물이 식생하는 식생공간이 마련된 시설물 내부에 전후방향으로 슬라이딩 가능하게 설치되며, 약제공급부로부터 약제를 공급받는 공급파이프와, 공급파이프에 설치되어 공급파이프를 통해 공급되는 약제를 상기 식물에 분사하는 분사노즐과, 시설물 내부에 설치되어 분사노즐로부터 분사되는 약제의 분사범위를 확장시키기 위해 공급파이프를 전후방향으로 왕복이동시키는 이동유닛을 구비하고, 이동유닛은 가이드부에 의해 시설물 내부에 전후방향으로 슬라이딩 가능하게 설치된 메인바디와, 시설물 또는 메인바디 중 어느 하나에 고정되며, 전후방향을 따라 다수의 기어이가
