The present invention relates to an ingrown nail correcting apparatus, which is an apparatus for correcting an ingrown nail, the apparatus comprising: a lower cover which is seated on an upper portion of the nail and has lower cover protrusions, A pair of first and second long holes are formed on the upper and lower covers, respectively, and each of the first and second long holes is formed in a flat plate shape so as to be slidable on both sides of the lower cover, A first gear portion having a saw tooth shape is formed on the inner rear side of the first elongated hole, a second gear portion having a saw tooth shape is formed on the inner front side of the second elongated hole on the rear side, And a first latching part that is bent toward the lower cover side is formed and the other side of the second elongated hole is provided with the other side A second extension bar and a second extension bar which are formed in a flat plate shape on the upper portion of the lower cover and are seated in the upper portion of the lower cover, And an upper cover protruding toward the lower side corresponding to the upper cover protrusion and having a through hole penetrating to the lower side at a central portion between the upper cover protrusions, And a toothed portion having teeth formed on an outer circumferential surface corresponding to the first gear portion of the first extending bar and the second gear portion of the second extending bar is formed at an upper portion of the toothed portion, And an upper portion of the extension portion is provided with an operable portion formed with a handle that can be gripped by a hand, And each of the first gear portion and the second gear portion is protruded, and each of the first gear portion and the second gear portion is spaced apart from the first gear portion and the second gear portion and is inclined with respect to the first gear portion and the second gear portion, And a lower fixing protrusion having a concavo-convex s
