PURPOSE: A hair iron is provided, which can express the whole hair style with various thicknesses according to the corresponding diameter of a heating rod. CONSTITUTION: A hair iron comprises: a heating electrode in which the heat is created; tongs which support molding by pressing hair while covering the heating rod without generation of heat; a controller(130) controlling the temperature adjustment and heating of the heating rod; a handle(140) applying power to tongs; and a pivot axis(150) transferring the power applied to the handle to the tongs. The heating rod is formed into multi-stages.
