The ingrown nail correcting device made of a resilient hard synthetic resin comprises an ingrown nail correcting device main body, an engaging member part curved into a hook shape to engage the ingrown nail and arranged at the front end of the ingrown nail correcting device main body, and a lever member inclined obliquely upward at an angle of 5 to 25 degrees with respect to the ingrown nail correcting device main body, and continuously arranged at a base end of the ingrown nail correcting device main body. The part between the ingrown nail correcting device main body and the lever member which are continuously arranged, is formed to serve as a fulcrum part.
