PROBLEM TO BE SOLVED: To provide a tooth for an infant to freely move a tooth up, down, left and right. The edge portion of the protruding portion 14 of the toothed portion 11 forms a concave portion 14 a that is curved in an arc shape toward the center side of the toothed portion 11. Further, on the surface of the protruding portion 14, for example, when the infant moves into the mouth, an upper dentition groove 20 in which the upper dentition of the infant is located is formed. Further, a lower jaw dentition groove 22 in which the lower dentition is located is formed on the back surface of the protruding portion 14.【課題】 乳児が歯を上下左右に自由に動かすことができる歯がためを提供する。歯がため１１の突出部１４の縁部は、歯がため１１の中心側に向けて円弧状に湾曲した凹部１４ａを形成している。また、突出部１４の表面には、例えば、幼児が口に咥えた際に、幼児の上顎歯列が位置する上顎歯列用溝２０が形成されている。また、突出部１４の裏面には、下顎歯列が位置する下顎歯列用溝２２が形成されている。
