This syringe is provided with: a presser resulting from a plunger rod being formed protruding anteriorly a gasket mounted in a non-slippable manner to the anterior end of the plunger rod a drug housing vessel having a tube shape that houses a drug therewithin and from the posterior end opening of which the gasket and anterior end of the plunger rod are inserted a needle member disposed at the anterior end of the drug housing vessel a needle cover disposed in a manner only able to advance and retreat without rotating with respect to the presser and a rotating mechanism that causes the drug housing vessel to rotate by a predetermined angle around the center axis of the tube shape with respect to the needle cover when the drug housing vessel has advanced with respect to the needle cover. By means of the presser advancing with respect to the needle cover, the drug housing vessel advances together with the gasket with respect to the needle cover, the drug housing vessel rotates with respect to the needle cover and presser by means of the rotating mechanism, the outer peripheral surface of the gasket is caused to move relative to the inner peripheral surface of the drug housing vessel, and the affixed state of the gasket to the inner peripheral surface of the drug housing vessel is released.Linvention concerne une seringue qui comprend : un presseur résultant dune tige de piston formée par protrusion antérieure un joint monté de manière non glissante sur lextrémité antérieure de la tige de piston un récipient hébergeant le médicament ayant une forme de tube qui héberge le médicament en son sein et à partir de louverture dextrémité postérieure duquel le joint et lextrémité antérieure de la tige de piston sont insérés un élément daiguille disposé à lextrémité antérieure du récipient hébergeant le médicament un étui protecteur daiguille disposé de manière à pouvoir seulement avancer et reculer sans rotation par rapport au presseur et un mécanisme de rotation qui force le
