A kind of anesthesia syringe for animals comprising syringe needle, cylinder and empennage. The syringe needle has interconnecting piece and the needle mouth to spray medical fluid,Position what needle mouth at be arranged with can free displacement backstop set； The cylinder one end has the tapered portion of a connecting needle interconnecting piece,And inside is installed with a piston to push medical fluid,Cylinder another end is connected with a closure body being made with rubber elastomeric material,Cylinder position what closure body and piston space is set to form the air pressure space of a filling gas,And what closure body is equipped with a closed pore that can be closed,Supplied gas injector freely passes into closed pore and injects gas with sharp what air pressure space,The high pressure gas propelling piston in air pressure space is utilized in turn,Force piston that medical fluid is pushed to spray in injection animal body； Disadvantage produced by prior art can thereby be overcome,The effect of reaching the risk easy to operate with reduction.一種獸用麻醉針筒，其包括針頭、筒體與尾翼。該針頭具有連接部與用以噴出藥液之針口，位於針口處套設有可自由位移之止擋套；該筒體一端具有一連接針頭連接部之漸縮部，且內部裝設有一用以推動藥液之活塞，筒體另端連接有一以橡膠等彈性材料製成之封蓋體，使筒體位於封蓋體與活塞間形成一填充氣體之氣壓空間，並於封蓋體穿設有一可閉合之閉孔，供氣體注入器自由穿入閉孔以利於氣壓空間注入氣體，進而利用氣壓空間內之高壓氣體推進活塞，迫使活塞推動藥液噴出注入動物體內；藉此即可克服先前技術所產生之缺點，達成操作簡單與降低危險性之功效。
