a binding bend;

a main plate to be mounted to a sole of a climbing shoe and having side plates formed with connection holes for binding the binding bend on both sides:

supporting shafts axially fixed to the side plates of the main plate outward;

movable spike elements axially coupled with the supporting shafts rotatively and provided with blade-shaped spike pieces;

pins fitted into the supporting shafts perpendicularly to the shafts; and

rotating locking levers axially coupled with the pins for rotating with respect to the pins, and having pressing cam surfaces for pressing the movable spike elements by manipulation of a user for converting positions of the movable spike elements;

wherein the movable spike elements have circular plate parts formed with position determining protrusions protruded toward the side plates, and the side plates have vertical position determining holes and horizontal position determining holes for receiving the position determining protrusions, wherein the vertical position determining holes are at positions of the spike pieces when the movable spike elements are standing vertically on the ground surface, and the horizontal position determining holes are at positions of the spike pieces when the movable spike elements are laying down horizontally on the ground surface.