The present invention relates to a toenail deformity correction device which: individually fixates both sides of correction members to both edges of a toenail, and fixates the fixated correction members by using a fastening tool to perform tensile force, and thus corrects the toenail to grow while covering skin without digging into the skin includes more than one correction members, and is not fixated only to an edge of a toenail, and thus be able to be applied to toenails in any shapes and provides uniform tensile force, and thus has excellent effects of alleviating symptoms and treatment. The toenail deformity correction device according to an embodiment of the present invention comprises: first and second correction members of both sides, in which adhesive pads, attached to both edges of a toenail, are individually formed on one side thereof and connecting hooks are individually formed on the other side thereof and a fastening tool which is fastened to the connecting hooks and provides tensile force to the first and second correction members. The toenail deformity correction device according to another embodiment of the present invention comprises: first and second correction members of both sides, in which fixing rings, inserted and fixated to both edges of a toenail, are individually formed on one side thereof and connecting hooks are individually formed on the other side thereof and a fastening tool which is fastened to the connecting hooks and provides tensile force to the first and second correction members. The toenail deformity correction device according to the other embodiment of the present invention comprises: a first correction member in which a fixing ring, inserted and fixated to an edge of a toenail, is formed on one side and a connecting hook is formed on the other side a second correction member in which an adhesive pad, attached to the other edge of the toenail, is formed on one side and a connecting hook is formed on the other side thereof and
