An objective of the present invention is to provide a correction instrument which is mountable without imparting excess force to a nail, and which is appropriately usable for respective correction of nails with different measurements. Provided is a pincer nail correction instrument, comprising: a left-side arm and a right-side arm, further comprising hook parts upon free ends thereof onto the lateral edge parts of a nail； and a fulcrum member between the left-side arm and the right-side arm with lower end parts as contact parts with respect to the nail. The fulcrum member further comprises: an axle which is combined to be vertically threadably extendable and retractable with respect to a base； a movable body which is vertically movably combined with the axle and which disposes the contact parts below the axle； and an impelling member which is interposed between the movable body and the axle with respect to the movable body. The contact member extends to the left and right, and further comprises protrusion parts respectively on the left end and the right end. The contact member makes contact with the nail via the protrusion parts, and does not make contact with the nail between the left and right protrusion parts.Un objectif de la présente invention est de fournir un instrument de correction qui peut être monté sur un ongle sans lui imprimer de force excessive, et qui peut être utilisé de manière appropriée pour la correction respective d'ongles de tailles différentes. La présente invention se rapporte à un instrument de correction d'ongles en trompette, comprenant : un bras gauche et un bras droit, comprenant en outre des parties en crochet au niveau de leurs extrémités libres recouvrant les parties bords latéraux d'un ongle ； et un élément pivot entre le bras gauche et le bras droit, les parties extrémités inférieures servant de parties de contact avec l'ongle. L'élément pivot comprend en outre : un axe qui est conçu pour pouvoir s'étendre et se rétracter verticale
