The present invention relates to an insulin pen needle for subcutaneous injection in diabetic patients with improved safety and usability. Accordingly, the technical gist of the present invention is to minimize the incidence of pain caused by the handling of the pen needle for diabetic patients during subcutaneous injection (all processes of opening, grasping, attaching, and separating the pen needle for assembling the insulin pen). , This is characterized in that the protruding block of the hub has a wide outer diameter, so that the contact area is wide when the drug is injected, so that pain is reduced, and the sense of grip holding the pen needle is improved, thereby enhancing usability. In addition, the present invention prevents from rising above the fixing groove as the adhesive (epoxy) filled to fix the injection needle is cured (dried) while sinking by its own weight in the fixing groove. It is characterized in that it is possible to fundamentally remove the pain-causing factor (protruding pointed protrusions that contact the skin during drug injection, causing pain such as stabbing) due to drug injection. In addition, the present invention allows the flange wing to protrude from the outer edge of the insertion hole of the small cap, and the flange wing corresponds to the opening of the hub so as to have a high degree of compression fitting, which is formed to block external exposure of the injection needle in the hub. It is characterized in that it prevents the risk of puncture by the needle and the risk of safety accidents such as secondary infection. In addition, the present invention greatly enhances the grip by forming a protrusion strip (protrusion line or protrusion body) on the outer circumferential surface of the hub, small cap, and large cap, respectively, as well as the protrusion strip (protrusion line or protrusion body) for assembly or post-processing. It is characterized in that it is formed to have a wide and low protruding surface when gripp
