A device for correcting an ingrown nail surely by a simple operation in a short time period of about 30 min to one hour without inflicting a pain on a patient. The ingrown nail correcting device comprises a vertical press down member having a press down head at the lower end portion, a raising angle sustention means extending laterally with a press down means being fixed to an intermediate portion, and raising members extending downward from positions facing each other while holding the intermediate portion of the raising angle sustention means therebetween and holding an anchor at each of the lower end portion. When a tension is applied to the raising member of the device attached to the outer surface of a nail, intermediate portion on the outer surface of the nail is pressed in the thickness direction of the finger by the press down head while exerting a raising force for correcting the ingrown nail for the anchors fixed to the side portion on the outer surface of the nail.