The present invention is a low pressure generated when the medicinal herbs are injected, the injection head is easily rotated by the magnetic force without the help of the rotary blade, which is a common member, so that the injection of the medicinal herbs can be easily carried out to control insecticides, weeding, which is more suitable for short distance and spraying than a long distance. An injector head unit coupled to a nozzle unit having a spray nozzle, which is more effective for the spray nozzle unit; A shaft tube inserted into the rotary tube screwed to the injector head; The shaft tube relates to a low pressure rotary spray nozzle for the inner surface of the left side of the right side mineralization. [Index] Injection nozzle, nozzle stem, injector head, recessed part, washer, screw groove shaft tube, rotary tube, screw projection, fuel supply tube, sealing ring.본 고안은 약재가 분사될 때 발생하는 저압력으로 분사기 헤드부가 통상적인 부재품인 회전날개의 도움없이 자력으로 회전하여 용이하게 약재의 분사가 이루어지므로 원거리보다 근거리·살포에 적합하는 살충, 제초 방제에 더욱 효과가 있으며 분사노즐을 가진 노즐대와 결합된 분사기 헤드부; 상기 분사기 헤드부와 나사 체결되는 회전관이 관삽된 축관; 상기 축관은 내면이 좌협우광화로 이루어진 저압용 회전 분무형 분사노즐에 관한 것이다[색인어] 분사노즐, 노즐대, 분사기 헤드부, 요입부, 와샤, 나사홈 축관, 회전관, 나사돌기, 연료공급관, 밀폐링.