A nail correcting device made of an elastic material includes: a pair of holding pieces (11) arranged side by side in a predetermined direction (P) and a connecting piece (12) connecting the holding pieces (11) to each other, the pair of holding pieces (11) each including: a body (13) at least partly in an arc within a plane intersecting with the predetermined direction (P) and a pair of first and second distal edges (14A, 14B) connected to both ends of the body (13) to hold a nail. The pair of first and second distal edges (14A, 14B) are spaced from each other along the predetermined direction (P) at an inner side and an outer side.
