The present invention relates to a filter assembly for a syringe which filters foreign substances withdrawn together with medicinal fluid from an ampoule when the medicinal fluid is sucked into a syringe, and blocks the collected foreign substances from being injected together with the medicinal fluid when the same is injected into the human body so the medicinal fluid is injected solely and to a syringe and IV assembly comprising the same. The filter assembly for a syringe comprises: a needle holder fixing a syringe needle to a front end and of which a neck unit of a cylinder is inserted to a rear end and a filter unit. The filter unit comprises: a support member having a head unit in a short tube shape with a hollow, an outer surface of a front end thereof in the longitudinal direction adhering to a corresponding inner circumference of the needle holder, and one or more through-holes penetrating in the front and back directions along a circumference between the hollow and an outer lateral edge, and an extension tube formed extensively from a rear central portion of the head unit to a rear portion thereof a valve member having a skirt unit whose front end unit covers at least an outer peripheral surface of the through-holes disposed on the front surface of the support member, and an extension unit in which a rear end unit extended from a rear portion of the inner circumference of the rear surface of the skirt unit comes into contact with the rear end of the hollow of the support member or is protruding to form the extension unit with a cut-out line on a center portion of the rear end portion and a filter having a front end unit coupled in a way that the same covers a lateral wall of the extension tube adjacent to the head unit, wherein the front end unit has an opening in a pouch shape and made of fiber.COPYRIGHT KIPO 2016본 발명은 주사기 내에 앰플의 약액을 흡입하는 과정에서 약액과 함께 혼입되는 이물질을 걸러 포집하고, 주사기 내의 약액을 인체에 투여할 때에 포집한 이물질의 흐름을 차단하면서 약액만 주입이 이루어질 수 있도록 하는 주사기용 필터조립체, 이를 포함하는 주사기와
