Disclosed is a rotary safety syringe (10), comprising an outer cylinder (20), a needle hub (30), and an injection push rod (40). One end of the outer cylinder (10) has an inner flange (24). The needle hub (30) has a stage groove (37) and a stopper portion (32) adjoining the stage groove (37), and the needle hub (30) abuts the inner flange (24) of the outer cylinder (20) through the stage groove (37) when assembled on the outer cylinder (20). When the needle hub (30) is in a first position (P1), the stopper portion (32) of the needle hub (30) clamps the inner flange (24) of the outer cylinder (20), and when the needle hub (30) is in a second position (P2), the stopper portion (32) of the needle hub (30) is staggered from the inner flange (24) of the outer cylinder (20). The injection push rod (40) can be movably disposed within the outer cylinder (20) and is detachably connected to the needle hub (30) for rotating the needle hub (30) from the first position (P1) to the second position (P2), so that the needle hub (30) can be pulled back into the outer cylinder (20) by the injection push rod (40) in order to increase the safety after injecting.Linvention concerne une seringue de sécurité (10) rotative, comprenant un cylindre externe (20), un raccord daiguille (30) et une tige poussoir (40) dinjection. Une extrémité du cylindre externe (10) comprend une bride interne (24). Le raccord daiguille (30) comprend une rainure à palier et une partie de bouchon (32) adjacente à la rainure à palier (37), et le raccord daiguille (30) sappuie sur la bride interne (24) du cylindre externe (20) par lintermédiaire de la rainure à plier (37) lorsquil est assemblé sur le cylindre externe (20). Lorsque le raccord daiguille (30) est dans une première position (P1), la partie de bouchon (32) du raccord daiguille (30) serre la bride interne (24) du cylindre externe (20), et lorsque le raccord daiguille (30) est dans une seconde position (P2), la partie de bouchon (32) du raccord daiguille
