PROBLEM TO BE SOLVED: To provide an ingrown nail prevention tool in which pain and inflammation based on an ingrown nail are not applied to the ingrown nail itself, and by paying attention in action of the bottleneck of a foot thumb, a load of the tip of a foot thumb is not applied when a body weight moves but the load is received by the entire back side of the foot thumb.SOLUTION: An ingrown nail prevention tool comprises a pad A given to a bottleneck 3 caused in the root of a foot thumb and enabling height adjustment, and a tape B with the pad A worn in a portion and being a holder to hold a position of the pad part A given to the bottleneck 3. Even as for the movement of a body to the forward direction, the body weight is received by the entire back side of the foot thumb.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】巻き爪に拠る痛みや炎症を、巻いた爪自体ではなく、足親指のくびれ部の作用に着目し、体重が移動した際に足親指の先端部の荷重が加わらず、足親指の裏面全体で荷重を受け止められるようにする。【解決手段】足親指の付け根に生ずるくびれ部3にあてがわれる高さ調整が可能なパッド部Aと、該パッド部Aがその一部に装着されており、前記くびれ部3にあてがわれた前記パッド部Aの位置を保持するための保持具であるテープBとから成り、身体の前方向への移動でも足親指の裏面全体で体重を受け止める。【選択図】図1