The present invention provides a safe protective cover for syringe, which comprises: a ringlike joining base and a protection cover connected to the joining base through a connecting member. The protective cover can be moved back and forth between a first position and a second position. The safe protective cover is joined with the barrel of the syringe by the joining base. After using the syringe, the protective cover may be moved from the first position to the second position, so that the needle may be completely shielded by the protective cover.一種注射針之安全防護蓋,包括:環狀的結合座,以及通過一連結件而連接於該結合座的護蓋,該護蓋可於一第一位置和一第二位置之間往復移動。該安全防護蓋以該結合座結合於注射針的針筒,當注射針使用完畢,可將該護蓋從第一位置移至第二位置,使護蓋完全遮蔽針頭。10‧‧‧結合座11‧‧‧內環112‧‧‧端面21‧‧‧外環211‧‧‧第一端面212‧‧‧第二端面25‧‧‧微凸肋30‧‧‧護蓋31‧‧‧背板32‧‧‧側板33‧‧‧側板34‧‧‧頂板35‧‧‧第一容置空間36‧‧‧第二容置空間37‧‧‧卡扣齒38‧‧‧擋片50‧‧‧連結件
