Pre-filled syringe and sleeve

The invention discloses a pre-filled syringe, which comprises a sleeve, as well as a core rod and a piston which are movably arranged in the sleeve, wherein a seal tube shell is arranged on the outer circumferential surface of a sleeve body; the seal tube shell comprises an accommodating space, and a bacterium blocking cap or a disinfecting piece is arranged in the accommodating space; an opening of the accommodating space faces outwards and is sealed by virtue of an aluminum foil covering film; and an axis of the seal tube shell is perpendicular to an axis of the sleeve body. According to the technical scheme, the pre-filled syringe provided by the invention mainly has the advantages that the pre-filled syringe conforms to operating modes of medical personnel, and the end of force application of the core rod and a convex shoulder of the sleeve body are contacted only, so that a risk that the aluminum foil covering film gets broken under force is eliminated, and the occurrence of medical accidents caused by c