PROBLEM TO BE SOLVED: To provide an oral composition in which the retention of potassium nitrate in the oral cavity is improved, the effect of suppressing hyperesthesia is excellent, and the foaming is also good. SOLUTION: The composition contains (A) potassium nitrate, (B) α-olefin sulfonate, (C) nonionic surfactant, and (D) cationic polymer substance, and contains (B) and (C) components. (B)/(C) which shows quantity ratio is 0.02-0.2 as a mass ratio, The composition for oral cavity characterized by the above-mentioned. [Selection diagram] None【課題】硝酸カリウムの口腔内滞留性が向上し、知覚過敏抑制効果の持続性に優れ、また、泡立ちも良い口腔用組成物を提供する。【解決手段】（Ａ）硝酸カリウム、（Ｂ）α－オレフィンスルホン酸塩、（Ｃ）ノニオン性界面活性剤、及び（Ｄ）カチオン性高分子物質を含有し、（Ｂ）及び（Ｃ）成分の量比を示す（Ｂ）／（Ｃ）が質量比として０．０２～０．２であることを特徴とする口腔用組成物。【選択図】なし
