The present invention relates to a lawn mower configured to rotate a cutter blade coupled to a driving shaft provided on an end of a work rod by receiving rotatory power generated by a power generation portion. The lawn mower has a spraying device formed therein and includes a pipe formed inside the driving shaft, a chemical storage tank for storing chemicals, a supply pipe for connecting the chemical storage tank to the pipe of the driving shaft, an opening and closing means for opening and closing the supply pipe, and a discharge nozzle coupled to a lower side end of the pipe and projecting from a bottom surface of the cutter blade. The chemicals contained in the chemical storage tank is supplied to the pipe through the supply pipe, and the discharge nozzle provided at a lower portion of the pipe rotates together with the cutter blade such that the chemical solution is sprayed toward the ground by centrifugal force. Accordingly, the present invention aims to provide a lawn mower provided with a spraying device capable of performing functions of a general lawn mower and also effectively spraying chemicals by discharging the chemicals to a desired area by using rotatory power of a cutter blade while a user mows the lawn without an additional power system.본 발명은 동력발생부로부터 발생된 회전력을 전달받아 작업봉의 단부에 마련된 구동축에 결합된 커터날을 회전시키는 예초기에 있어서, 상기 구동축의 내측으로 관로가 형성되고, 액상의 약액을 저장하는 약액저장조와, 상기 약액저장조와 구동축의 관로를 연결하는 공급관과, 상기 공급관을 개폐하는 개폐수단과, 상기 관로의 하부측 단부에 결합되어 커터날의 저면으로 돌출되는 토출노즐을 포함하는 분무장치가 구비되어, 상기 약액저장조에 수용된 약액이 공급관을 통해 관로에 공급되고, 관로의 하부에 마련된 토출노즐이 커터날과 함께 회전하면서 원심력에 의해 약액이 지면을 향해 분사되는 것을 특징으로 하는 분무장치가 구비된 예초기에 관한 것이다.
