Disclosed in the present invention is a device for injecting a drug into skin, which sprays cooling air to the skin to cool and anesthetize the skin, and automatically injects the drug into the skin through a needle. The device for injecting a drug into the skin according to the present invention comprises: a main body which includes a needle module configured to inject a drug into the skin a guide unit which is installed in the main body to move forward and backward along a drug injection direction of the needle module, and comes in contact with the skin while being forwardly protrudes by a fixed distance from the needle module an elastic member which is installed inside the main body to provide elasticity to the guide unit such that the guide unit is returned to the front position when a force that pushes the guide unit backward is removed a cooling spray unit which is affixed to the guide unit to spray cooled air toward the skin in front of the needle module a sensor unit which is installed inside the main body to sense contact with the guide unit as the guide unit moves forward and backward and a control unit. In particular, the control unit sprays the cooled air to the skin through the cooling spray unit while the guide unit is in contact with the skin senses the contact and operates the needle module, as the guide unit comes in contact with the skin and is subsequently pushed and moved backward to be in contact with the sensor unit and stops operation of the needle module when the contact with the sensor unit is released as the guide unit moves forward.COPYRIGHT KIPO 2018냉각 공기를 분사하여 피부를 냉각 마취시키고 니들을 통해 피부에 약물을 자동으로 주입할 수 있는 피부용 약물주입장치가 개시된다. 본 발명에 따른 피부용 약물주입장치는, 피부에 약물을 주입하는 니들모듈이 구비된 본체와, 본체에 니들모듈의 약물 주입방향을 따라 전후로 이동 가능하게 설치되며 니들모듈의 전방으로 소정 간격 돌출된 상태에서 피부와 접촉하는 가이드부와, 본체의 내부에 설치되며 가이드부를 후방으로 누르는 힘이 제거되면 가이드부가 전방으로 복귀되도록 가이드부에 탄성을 제공하는 탄성부재와, 가이드부에 고정되며 니들모듈의 전방측 피부를 향해 냉각된 공기를 분사하는 냉각분사부와, 본체 내에 설치되고 가이드부가 전후로 이동함에 따라 가이드부와의 접촉을 감지하는 센서부와, 가이드부를 피부에 접촉한 상태에서
