EO average molar number of addition in C14~18 its salts, derivatives thereof, POE hydrogenated castor oil (C) EO average addition mole number 10 to 60, an alkyl group (B) or vitamin E (A) or ascorbic acid phosphate ester surfactant selected from alkyl glucosides C10~14 alkyl group and POE alkyl ethers of 5 to 8, and contains (D) non-ionic biocides, total (A), (B) and (D) 0.2 to 1.5 wt% amount, (C) / ((B) + (D)) is 8 to 20 at a mass ratio, (A) ~ (C) and the component, (E) cationic bactericidal A content of the agent, 0.2 to 1.3 mass%, the total amount of the components (A), (B) and component (E), (C) / ((B) + (E)) is 8 to mass ratio It is an oral composition is 18, according to the present invention, its salts, fungicides or its derivatives and vitamin E is formulated and effectively stabilizing ascorbic acid or a phosphoric acid ester, or the prevention of periodontal disease with excellent The excellent storage stability over time and can, exerts an improving effect.(A)アスコルビン酸リン酸エステル又はその塩、(B)ビタミンE又はその誘導体、(C)EO平均付加モル数10~60のPOE硬化ヒマシ油、アルキル基がC14~18でEO平均付加モル数5~8のPOEアルキルエーテル及びアルキル基がC10~14のアルキルグルコシドから選ばれる界面活性剤、及び(D)非イオン性殺菌剤を含有し、(A)、(B)及び(D)の合計量が0.2~1.5質量%、(C)/((B)+(D))が質量比で8~20で、(A)~(C)成分、及び(E)カチオン性殺菌剤を含有し、(A)、(B)及び(E)成分の合計量が0.2~1.3質量%、(C)/((B)+(E))が質量比で8~18である口腔用組成物であり、本発明によれば、アスコルビン酸リン酸エステル又はその塩、ビタミンE又はその誘導体、及び殺菌剤が安定かつ有効に配合され、優れた歯周疾患の予防又は改善効果を奏し、かつ経時保存安定性に優れる。
