The present invention relates to a synthetic resin airing cap for a syringe which is used by being combined with a disposable syringe used in medical field and, specifically, to a synthetic resin airing cap for a syringe which smooths injection and absorption of an injection by being combined with the syringe when injecting or absorbing the injection inside vial and flowing through external vial and air without generating sound pressure inside the vial. The synthetic resin airing cap for a syringe comprises: a pipe shaped housing which is formed with synthetic resin material, and in which the inside which makes body is penetrated, and front and back are opened a hub fixing unit which is formed as the inside is penetrated in order for the hub of the syringe is inserted into the rear side of the housing in order to be closely fixed a middle part which is extended to be connected to the hub fixing unit a vial insertion unit which is formed to be inserted into the vial while being extended to be connected to the middle part a syringe needle insertion path which is formed by being penetrated in order for the syringe needle to be closely inserted into the inside the vial insertion unit a front ventilation tool which is formed in an opened hole form in order for the external housing and the internal housing to be connected in front part of the vial insertion unit a ventilation path which is formed by being penetrated inside the vial insertion unit and is connected to the front ventilation tool and a hole shaped rear ventilation tool which is formed for the external and internal housing to be connected by being connected to the ventilation path in the rear part of the housing.COPYRIGHT KIPO 2014본 발명은 의료분야에 사용되는 일회용 주사기에 결합하여 사용하는 주사기용 합성수지 통기캡에 관한 것으로서, 바이알(Vial) 내의 주사액을 주입하거나 흡입할 때 주사기에 결합하여 바이알 내부에 음압이 생기지 않고 바이알 외부와 공기가 통하도록 하여 주사액의 주입과 흡입이 원할하도록 하는 주사기용 합성수지 통기캡에 관한 것이며, 몸체를 이루는 내부가 관통되며 합성수지 재질로 형성된 전후가 개방된 관형의 하우징과 상기 하우징의 후방부에 상기 주사기의 허브가 삽입되어 밀착 고정될 수 있도록 내측이 관통된 형태
