PROBLEM TO BE SOLVED: To easily and appropriately correct the koilonychia.SOLUTION: The nail corrector comprises: a frame body 1 including an acceptance area 10 at a fingertip Fa side of one finger F a right-side presser body 2 that has a contact part 5 brought into contact with a right end side Nc of a nail N of the finger F at the inside of the frame body 1, is supported by the right side of he frame body 1 so as to threadedly advance/retreat, and moves the contact part 5 by the threaded advance/retreat and a left-side presser body 3 that has the contact part 5 brought into contact with a left end side Nc of the nail N of the finger F at the inside of the frame body 1, is supported by the left side of he frame body 1 so as to threadedly advance/retreat, and moves the contact part 5 by the threaded advance/retreat.
