The present invention provides a corrector for a deformed nail capable of being easily inserted into near a root of the nail without giving pain to a patient when attaching the corrector even for a serious ingrown nail which is significantly deformed and curved or a deformed nail having an irregular shape on a lateral edge. Thus, a great effect of the correction can be obtained and the deformed nail can be prevented from occurring again. The corrector includes a band-shaped central region to be in contact with an upper surface of the nail； and an insertion edge region continuously extended from at least one end of the band-shaped central region to be inserted between a lateral nail edge and a lateral nail fold, wherein when a direction of a base side of the nail is defined as an upstream and a direction of a tip side of the nail is defined as a downstream in a state that the corrector is attached to the nail, a screw impeller-shaped portion having a specific shape and dimension is formed on a portion including an end portion of an upstream side of the insertion edge region and a hook portion is formed on a downstream side of the insertion edge region in comparison to the screw impeller-shaped portion to hold the lateral nail edge of the nail or a lateral edge of a nail tip.【課題】変形、湾曲の強い重度の変形爪、または、爪側縁部が不規則な形状となっている変形爪であっても、装着時に患者に痛みを与えずに、爪の根元の近くまで容易に挿入することができ、それにより、大きな矯正効果が得られ、かつ、変形爪の再発を防止できる変形爪の矯正具を提供する。【解決手段】爪の上部表面に当接させるための帯状中央部領域３、及び該帯状中央部領域の少なくとも一端から連続して伸びる、側爪甲縁と側爪郭との間に挿入するための挿入縁部領域４を有し、矯正具を爪に装着した際に、爪の根元側となる方向を上流、爪の先端側となる方向を下流としたときに、挿入縁部領域４の上流側端部を含む箇所に特定の形状と寸法を有するスクリュー翼様部が形成され、かつ、挿入縁部領域４のスクリュー翼様部よりも下流側に、爪の側爪甲縁部又は爪先の側縁部を把持するためのフック部が形成されてなることを特徴とする矯正具。【選択図】図４
