The present invention relates to an apparatus for automatic injection. According to an embodiment of the present invention, the apparatus for automatic injection comprises: an infrared light emitting part for irradiating infrared light on an object to be injected an infrared light receiving part for collecting infrared light reflected from the object a control part for obtaining blood vessel location information of the object by using the light amount of the collected infrared light, selecting the optimal location to insert a needle by using the blood vessel location information, and controlling the location and direction of the needle in real-time an injection operation part for inserting the needle to allow a needle tip to reach the optimal location according to a control signal of the control part. Also, according to an embodiment of the present invention, the method for automatic injection comprises the steps of: irradiating infrared light on an object to be injected collecting the infrared light reflected from the object obtaining blood vessel location information by using the light amount of the collected infrared light selecting the optimal location to insert a needle by using the blood vessel location information and inserting the needle to allow a needle tip to reach the optimal location by controlling the position and direction of the needle in real-time. According to the present invention, a user can exactly find vein blood vessel and administer drug in an emergency without an expert, and pain of a patient who has a trouble in finding blood vessel can be reduced by automatically administering the drug into the most appropriate vein blood vessel to a drug administration. Also, it is possible to exactly and effectively administer the drug and gather blood, thereby reducing side effects of blood gathering.COPYRIGHT KIPO 2015본 발명은 자동 주사 장치에 관한 것으로, 본 발명의 일 실시 예에 따른 자동 주사 장치는 적외선을 피주사체에 조사하는 적외선 발광부, 피주사체에서 반사되는 적외선을 수집하는 적외선 수광부, 수집된 적외선의 광량을 이용하여 피주사체의 혈관 위치
