PROBLEM TO BE SOLVED: To provide a composition for the oral cavity in a pasty, mousse, gel, creamy and liquid state which is blended with calcium phosphate capable of inducing recalcification of an enamel surface layer.SOLUTION: There is provided a composition for the oral cavity which comprises calcium phosphate (A), thickening silica fine particles (B) showing a pH of 6 to 11 when dispersed in water and water (C), which has excellent storage stability and is effective for recalcification of the decalcified enamel surface layer.SELECTED DRAWING: NoneCOPYRIGHT: (C)2018,JPO&INPIT【課題】エナメル質表層の再石灰化を誘導することができるリン酸カルシウムを配合したペースト状、ムース状、ジェル状、クリーム状、及び液体状の口腔用組成物の提供。【解決手段】リン酸カルシウム(A)、水に分散させた際のpHが6~11を示す増粘性シリカ微粒子(B)、水(C)を含む、口腔用組成物とすることで性状が変化しない優れた保存安定性を有した、脱灰したエナメル質表面の再石灰化の誘導化に有効な口腔用組成物。【選択図】なし