A bone nail (1) for the heel includes: a front portion (2) determined for insertion into one or more bones (14, 15, 16) or bone fragments of the heel and having a tip (3), and an arc-shaped main portion (4) extending from the front portion (2) and having a rear end (5), wherein the main portion (4) includes a tapered shape such that a cross sectional diameter of the main portion (4) within at least one first section (20) increases towards the rear end (5). According to embodiments, a curvature of the arc-shaped main portion (4) includes a radius of curvature rc which amounts to at least 130 mm. According to other embodiments, the tapered shape is a conical shape.一種足跟骨釘(1)，包含：前部(2)，預定插入足跟之一或以上骨骼(14,15,16)或骨片內，並具有末端(3)；以及弧形主部(4)，從前部(2)延伸，並具有後端(5)，其中主部(4)呈斜縮形狀，使在至少第一段(20)內之主部(4)斷面直徑，朝後端(5)遞增。按照具體例，弧形主部(4)之曲率含曲率半徑rc，為至少130mm。按照另一具體例，斜縮形狀為錐形。
