The present invention relates to an unmanned pest control apparatus having a novel structure which can effectively control the flow of liquid chemicals, and effectively mix the liquid chemicals stored in a storage tank. According to the present invention, the unmanned pest control apparatus sprays high pressure air into the storage tank (12) through an spray hole (28c) of a filter (28) by supplying the high pressure air supplied by an air feeder (13) to the filter (28) provided in the storage tank (12) according to the operation of a user, thereby simply and efficiently stirring the liquid chemicals stored in the storage tank (12). To this end, the unmanned pest control apparatus comprises: a spray nozzle (11) provided in a greenhouse the storage tank (12) which stores liquid chemicals the air feeder (13) and a supply unit (A) which supplies the liquid chemicals and high pressure air to the spray nozzle (11) by connecting the storage tank (12) and the air feeder (13) to the spray nozzle (11).COPYRIGHT KIPO 2016본 발명은 약액의 흐름을 효과적으로 제어하면서, 저장탱크에 저장된 약액을 효과적으로 혼합할 수 있도록 된 새로운 구조의 무인방제장치에 관한 것이다.본 발명에 따른 무인방제장치는 사용자의 조작에 따라, 급기수단(13)에 의해 공급된 고압의 공기를 저장탱크(12)에 구비된 필터체(28)로 공급하여 필터체(28)의 분사공(28c)을 통해 저장탱크(12)의 내부로 분사되도록 함으로써, 저장탱크(12)에 저장된 약액을 간단하면서 효과적으로 교반할 수 있는 장점이 있다.