a spike pad (20) of an elastic material such as a foaming resin or rubber provided with a plurality of spikes (10); and

a hook formed in the spike pad (20) in a single body with the spike pad (20) to be fixably hooked over shoes,

wherein the hook comprising a limb band (30) oriented from four edges of the spike pad (20) toward the contour and a ring band (40) inscribed in a front end of the limb band (30),

wherein the spike pad (20), the hook, the limb band (30), and the ring band (40) are formed of an elastic material in a single body with one another,

wherein the limb band (30) includes:

first bands (31) oriented toward the toe of the shoes and symmetrically formed;

second bands (32) oriented toward the heel of the shoes and symmetrically formed;

a trapezoidal toe hook (A) formed by the first band (31) and a first arc (41) of the ring band (40) that connects the first bands (31) with each other;

a fan shaped heel hook (B) formed by the second band (32) and a second arc (42) of the ring band (40) that connects the second bands (32) with each other; and

a both-side pressing portion (C) formed by a third arc (43) that connects the first arc (41) with the second arc (42),

wherein the second arc (42) is provided with a third band (42a) formed across the inside of the crampon and a fourth band (42b) that connects a middle portion of the third band (42a) with a middle portion of the second arc (42), the third band (42a) and the fourth band (42b) being formed in a single body with each other.