Fastening device for injection needles

Based on the invention, a advancing the injection device thread (5) is fixing device for injection needle for (11), the device comprises with an opening end and a closed end needle cap (1), wherein the closed end (2) is of the needle the middle part of needle cap. At least three elastic elements (3) arranged along the needle cap (1) and area; and elastic elements comprising towards the screw (5) relating part of the middle (4). Are and bulge part of the thread (5) thins gradually (4) is provided at least a concave groove of parallel (8) on the inner surface, from each finger part (4) at least two similarly vertical with the threads (5) are firmly tip (9). The claims at least three with a needle cap (1) and thread (5) between the contact point the same plane, which is a needle cap (1) stably of the screw (5) is placed, and other side of the clamp pressure with needed, or enables the needle cap (1) and is provided with a corresponding higher elastic is formed possibly, so the needle cap (1) or the injection needle (2) can be, wherein corresponding is high and is less thread (5) is.