A corrective brace which has a simple structure with fewer components, prevents lowering of a correcting force of a nail, can be easily attached to the nail body, and will not disturb daily life after attachment is provided.A nail corrective brace includes:a first correcting member including:a first correcting body formed of a hard line material having elasticity and provided with a first locking piece locked by one side end edge in a width direction of a nail body on one end side thereofa first correcting operation body formed of a soft line material having elasticity and pulling the first locking piece close to an intermediate portion side in the width direction of the nail body with predetermined tension to pull up the one side end edge of the nail body anda first support body which connects the other end side of the first correcting body and one end side of the first correcting operation body and has a support surface brought into contact with a surface of the nail body and supporteda second correcting member including:a second correcting body formed of a hard line material having elasticity and provided with a second locking piece locked by the other side end edge in the width direction of the nail body on the one end side thereofa second correcting operation body formed of a soft line material having elasticity and pulling the second locking piece close to the intermediate portion side in the width direction of the nail body with predetermined tension to pull up the other side end edge of the nail body anda second support body which connects the other end side of the second correcting body and one end side of the second correcting operation body and has a support surface brought into contact with the surface of the nail body and supported anda fixing portion which adjusts the tension of pulling up the one end side and the other end side in the width direction of the nail body by crossing the other end side of the first correcting operation body and the other e
