The invention relates to a safety needle sleeve structure of a syringe. The main safety needle sleeve is a clip with a clamping end forming a two-part body and forming a sleeve structure, so that the sleeve structure can be combined with and cover the needle head corresponding to the needle seat of the syringe, so that the sleeve structure can be opened through the force of the pressing arm, so as to achieve the safety of taking down the safety needle sleeve laterally and avoiding the wrong contact of the needle head.本創作係一種注射器之安全針套結構，主要該安全針套係一夾固端構成兩半型體而結合成套筒結構之夾子，令套筒結構可對應注射器的針座而結合、覆蓋針頭，俾可經由按壓臂的施力而開啟套筒結構，達到側向取下安全針套而避免誤觸針頭之安全性者。
