Abstract: The present invention relates to a hypodermic syringe assembly for performing injections which has as components a flexible elastomeric protective cover into which the needle portion of a hypodermic syringe can be embedded, an inflexible hollow cylindrical sleeve which fits over the aforesaid elastomeric protective cover and a medication chamber which is bounded at its forward end by a metal needle and at its rear with an elastomeric stopper. The inflexible hollow cylindrical protective sleeve is provided at its front with connecting means so that when it is removed from the metal needle it can be attached at the rear of the medication chamber to serve as a plunger for performing injections. An additional feature of the inflexible protective sleeve is its provision with flexible gripping means which when depressed exert pressure upon the inner elastomeric protecting sleeve, thereby allowing the elastomeric protecting sleeve to be removed along with the inflexible protective sleeve.