The present invention discloses a chemical liquid injection device, the present invention is a chemical liquid injection device of the present invention is configured to form a piston member in contact with the air ejection hole of the pumping member at one end inside the injection pipe while helix coupling the pumping member and the injection pipe, Accordingly, the sealing efficiency is increased through the stable coupling of the pumping member and the injection tube, and when the air is ejected from the air ejection hole by the pumping operation of the pumping member, the ejected air pushes the piston member, and the piston member is present in the injection tube. It is possible to inject all of the women's resistant phase to improve the cleaning and prevention effect, as well as the treatment of resistant disease caused by drug injection.본 발명은 약액 주입장치를 개시한 것으로, 이러한 본 발명은 본 발명의 약액 주입장치는 펌핑부재와 주입관을 나선 결합시키면서 주입관 내부 일단에 펌핑부재의 에어분출공과 접촉되는 피스톤부재를 구성한 것이고, 이에 따라 펌핑부재와 주입관의 안정적인 결합을 통해 실링 효율을 높이고, 펌핑부재의 펌핑동작으로부터 에어분출공에서 에어 분출시 그 분출되는 에어가 피스톤부재를 밀어내면서 피스톤부재가 주입관 내부에 존재하는 약액을 여성의 내성기에 모두 주입할 수 있도록 하여 약액 주입에 따른 내성기 질환 치료는 물론 세정 및 예방 효과를 높인 것이다.
