A normal-type safety syringe includes a barrel, a plunger, and a needle stand. The barrel is extended along an axis and includes a first tube portion, a second tube portion extended from one end of the first tube portion, and a first reflexed ring flexibly branched and formed on the inner side of the first tube portion and disposed around the axis, such that after the first reflexed ring is unfolded, the first reflexed ring is bounded and extended from the first tube portion toward the second tube portion, and includes a first ring base portion disposed at the first tube portion and a first flexible portion movably disposed opposite to the first ring base portion. The plunger includes a rod and a plug installed at an end of the rod. The needle stand is detachably installed in the second tube portion. The plunger can be moved between an injecting position, a limit position, and a disposal position with respect to the needle stand.一種普通式安全針筒，包含一管體、一推桿，及一針頭座。管體沿一軸線方向延伸，並包括一第一管體部、一由第一管體部一端延伸的第二管體部，及一可撓折地歧生於第一管體部內側且環繞軸線的第一反摺環，第一反摺環反摺疊後由第一管體部朝第二管體部縮束延伸，並具有一設置於第一管體部的第一環基部，及一可活動且相反於第一環基部的第一撓性部。推桿包括一桿部，及一設置於桿部一端的塞部。針頭座可脫離地設置於第二管體部內。其中，推桿可相對於針頭座於一待注射位置、一極限位置，及一拋棄位置之間移動。
