The bulletin can be equipped with a different syringe capacity (1cc, 3cc, saying the 5cc) in one of the injector selectively, half the infusion on the human skin automation and injectors so have the compatibility that allows the operator to provide convenience and practicality, Drug injector for injecting according to an embodiment of the information disclosed herein is And a lead screw which is rotatably naeseol by a drive motor, and a pusher moved by the rotation of the lead screw is secured to the push additional removal of a different syringe dose holder, the needle guide being seated needle body of the syringe addition body parts made Different dose body portion being selectively secured to the syringe, the lifting piece is supported by the lifting possibly elastic member naeseol a height that varies according to the size of the syringe body A fixed position according to the body size of the syringe that is mounted on the lifting side is variable, and the pressing parts of the body when the drug infusion to the body holder to prevent the flow of the injector The control unit including being installed on the side of the body portion outside, and a power switch for controlling the power supply to the drive motor, a selection switch for moving by the push portion set distance to correspond to a dose of the syringe is mounted on the lift piece but having a, When operating the select switch corresponding to the dose of the syringe after the dose replaceable mounted to any syringe different to the lifting side, to move a push of the syringe by the rotation of said lead screw by a certain distance provides an injector for injecting a drug characterized in that the medication can be injected through the skin to the human body.게시된 내용은 하나의 인젝터에 용량(1cc, 3cc, 5cc를 말함)이 상이한 주사기를 선택적으로 장착하여 사용할 수 있고, 인체의 피부에 대한 약물 주입을 반 자동화하고 인젝터가 호환성을 갖게 되므로 시술자에게 편리성 및 실용성을 제공할 수 있도록 한 것으로,본 명세서에 게시된 내용의 일 실시예에 따른 약물 주입용 인젝터는구동모터에 의해 회전가능하게 내설되는 리이드스크류와, 상기 리이드스크류의 회전에 의해 이동되며 약물 용량이 상이한
