A safety filter according to the present invention comprises: a first body, which is connected to a cylinder, and which has a first channel formed therein such that a liquid medicine passes through the same； a second body, which is coupled to the first body in a sealable manner, to which a syringe needle is connected, and which has a second channel formed therein such that the liquid medicine passes through the same； and a filter moving unit, which is mounted between the first body and the second body to be able to slide, which has a filter mounted thereon so as to filter the liquid medicine, and which selectively positions the filter between the first channel and the second channel, wherein, when the liquid medicine is injected into the cylinder, the liquid medicine is prevented from passing through the filter, and, when the liquid medicine is injected into a human body, the liquid medicine is made to pass through the filter.Le filtre de sécurité selon la présente invention comprend : un premier corps qui est relié à un cylindre et comporte un premier canal, formé à l'intérieur de celui-ci et permettant le passage d'un médicament liquide； un second corps, qui est couplé au premier corps de manière étanche, auquel une aiguille de seringue est raccordée et qui comporte un second canal formé à l'intérieur de celui-ci et permettant le passage du médicament liquide； et une unité de déplacement de filtre, qui est montée entre le premier corps et le second corps de manière coulissante, comporte un filtre monté sur celle-ci afin de filtrer le médicament liquide et positionne sélectivement le filtre entre le premier canal et le second canal. Lorsque le médicament liquide est injecté dans le cylindre, il est empêché de traverser le filtre； et lorsque le médicament liquide est injecté dans un corps humain, il est amené à traverser le filtre.본 발명의 안전필터는 실린더에 연결되고 약액이 통과하는 제1유로가 형성되는 제1몸체와, 상기 제1몸체에 밀봉 가능하게 결합되고 주사바늘이 연결되며, 약액이 통과하는 제2유로가 형성되는 제2몸체와, 상기 제1몸체와 제2몸체 사이에 슬라이드 이동 가
