The utility model relates to a pneumatic needle free injection device, which accumulates the compressed gas into a pressure chamber, so as to have instantaneous high-speed high-pressure jet when used, drive the drug delivery pressure pipe to penetrate the skin, and inject the drug into the dermis of the skin, which has the effect of accelerating the absorption of the skin to the fluid drugs, and can be connected with a high-pressure gas cylinder, and has the function of taking it with you when you go out. Convenient effect.一種氣動式無針注射裝置，其係將導入之壓縮氣體蓄積在一壓力室中，俾當使用時具有瞬間高速高壓噴流，帶動藥物輸送加壓管將藥物穿透皮膚，並注入至皮膚的真皮層，具有能夠加速皮膚對於流體藥物吸收之功效增進，且其可連接一高壓氣瓶，具有外出隨身攜帶方便之功效增進。
