Implant syringe

An implant syringe comprises a syringe needle holder, which holds an injection needle, an axially adjoining preparation receptacle and an outer sleeve with a radially projecting front gripping section on its rear end section, wherein the injection needle holder and the outer sleeve are connected together for common axial movement, including an inner sleeve, on which the outer sleeve is slidably located and in which the syringe needle is movable with the preparation receptacle, wherein the inner sleeve has axial slots, through which webs extend, which connect the outer sleeve to the syringe needle holder, further including a rod-shaped piston, which is fastened to a rear gripping section and is partially surrounded by a rear sleeve, which movably engages in the inner sleeve, wherein the rod-shaped piston is advanceable through the preparation receptacle into the syringe needle so far that a spacing remains between the tip of the syringe needle and the head end of the piston, which is approximately equal to the length of the preparation to be delivered, and the advance of the piston is limited by the rear gripping section reaching the rear edge of the inner sleeve, wherein the outer sleeve is releasably locked in the advanced starting position with the syringe needle exposed by a blocking device, which is arranged on the inner sleeve and projects radially outwards, and wherein the blocking device is moved radially inwards on advance of the rear sleeve into its end position, whereby the outer sleeve is released and is retractable by means of the front gripping section on the inner sleeve.