To provide an incurvated nail correction tool for deformed nails that can be put on easily by a patient alone without causing pain, the incurvated nail correction tool 10 includes a central portion 12 made of an elastic wire material bent in a waveform, the waveform being formed, in its free state, within a flat plane, or a curved plane flatter than a curve that runs along a nail plate in contact therewith, U-shaped portions 14 connecting both ends of the central portion 12 with hook portions and brought into contact with the nail from front and back, and hook portions 16 to be hooked to at least one of both sides in the width direction of the nail and a tip portion from the back side, the elastic wire material being made of a superelastic alloy, and the hook portions 16 being hooked such that an end face of the elastic wire material makes contact with the back side of the nail.
