PROBLEM TO BE SOLVED: To correct an ingrown nail easily.SOLUTION: A nail attachment part 20 is formed by bending a metal plate, a main base plate 21 and a sub base plate 22 having a short length are formed to be parallel to each other through a connection plate 23, and the main base plate 21 and the sub base plate 22 can be opened elastically. On an upper face of the main base plate 21, a lateral groove 24 fitting with a connection material 30 is arranged. The connection material 30 is formed of a metal body of a super elastic body or shape memory body. After an edge of the connection material 30 fits with the lateral groove 24 of the main base plate 21, the connection material 30 is fixed on the main base plate 21. By thrusting the two nail attachment parts 20 onto both sides of an ingrown nail, the ingrown nail is held elastically with the main base plate 21 and sub base plate 22. The ingrown nail is thus corrected by utilizing a function of straightening of the connection material 30.SELECTED DRAWING: Figure 1
