the present invention relates to a syringe and more particularly to a device obtained by refining a conventional syringe having an injection flow passageway including a needle to share a portion of the injection flow passageway； except the needle, or with a suction flow passage completely independent of the injection flow passage, thereby smoothing the suction of the liquid medicine. the syringe includes a needle (10) and a cylinder (20) and is configured with an injection flow passageway extending from the cylinder (20) to the needle (10), and further includes an opening / closing means (400) ) to selectively open or close the injection flow passage； and a suction flow passage formed from the pointed hollow cap (100) to the cylinder (20) and configured with a through hole (200) disposed in any needle (10), a connector for connecting the needle (10) to the cylinder ( 20), and the cylinder (20) for establishing communication between its internal and external part thereof, and a valve (300) for intermittently controlling the opening or closing of the suction flow passage during user manipulation. The syringe according to the present invention is configured such that a separate suction flow passage surrounding the needle is formed in the conventional syringe to perform the liquid drug suction procedure more smoothly, maximizing user convenience and commercial viability. and further configured to forcibly close the suction flow passage during injection of the liquid medicament.a presente invenção se refere a uma seringa e, mais particularmente, a um dispositivo obtido através do aperfeiçoamento de uma seringa convencional, com uma passagem do fluxo de injeção, incluindo uma agulha, de modo a compartilhar uma porção da passagem do fluxo de injeção, exceto a agulha, ou com uma passagem do fluxo de sucção completamente independente da passagem do fluxo de injeção, suavizando assim a sucção do medicamento líquido. a seringa inclui uma agulha (10) e um cilindro (20) e é conf
