A medical syringe (1) with a tool cavity, comprising an outer sleeve (2), a core rod (3), and an injection needle (4). One side of the core rod (3) is provided with a tool cavity (20) which is laterally opened and allows placement of the injection needle (4) a push flange (11) of the core rod (3) is provided with a notch (25) at the side of the tool cavity (20). Before use of the medical syringe (1), the injection needle (4) is placed into the tool cavity (20) of the core rod (3) during use of the medical syringe (1), a tapered lipping (22) of the syringe (1) placed into the tool cavity (20) of the core rod (3) is pinched at the notch (25) of the push flange (11) of the core rod (3) so that the injection needle (4) is taken out from the lateral opening of the tool cavity (20) after use of the medical syringe (1), the injection needle (4) inserted onto a conule (7) of the outer sleeve (2) is removed and placed into the tool cavity (20) of the core rod (3) from the lateral opening of the tool cavity (20), and then the core rod (3) is pushed to the bottom so that most of the core rod (3) enters into the outer sleeve (2), such that the purpose of a small overall size of the finally formed safe medical syringe is realized, and subsequent destruction processing can be conveniently performed.La présente invention concerne une seringue médicale (1) avec une cavité doutil, comprenant un manchon externe (2), une tige centrale (3) et une aiguille dinjection (4). Lun des côtés de la tige centrale (3) est pourvu dune cavité doutil (20) qui est ouverte latéralement et permet le placement de laiguille dinjection (4) une bride de poussée (11) de la tige centrale (3) est pourvue dune encoche (25) sur le côté de la cavité doutil (20). Avant lutilisation de la seringue médicale (1), laiguille dinjection (4) est placée dans la cavité doutil (20) de la tige centrale (3) pendant lutilisation de la seringue médicale (1), un pincement conique (22) de la seringue (1) placé dans la cavité do
