A nail correcting device made of an elastic material includes: a pair of holding pieces arranged side by side in a predetermined direction and a connecting piece connecting the holding pieces to each other, the pair of holding pieces each including: a body at least partly in an arc within a plane intersecting with the predetermined direction and a pair of first and second distal edges connected to both ends of the body to hold a nail. The pair of first and second distal edges are spaced from each other along the predetermined direction at an inner side and an outer side.
