PROBLEM TO BE SOLVED: To provide a liquid oral composition in which a calcium ion can be stably formulated, and which can effectively prevent dental caries and periodontal disease by improving retentivity of a cationic bactericide on the surface of the oral tissue.SOLUTION: The liquid oral composition contains the following components (A) to (C): (A) 0.005-1 mass% calcium ion-supplying compound, (B) a cationic bactericide and (C) a nonionic surfactant containing (C1) a fatty acid ester of a polyglycerol and (C2) a nonionic surfactant having 16-20 HLB except the component (C1).COPYRIGHT: (C)2009,JPO&INPIT【課題】カルシウムイオンを安定に配合でき、カチオン性殺菌剤の口腔組織表面への滞留性を向上させることにより、う蝕と歯周疾患を効果的に予防し得る液体口腔用組成物の提供。【解決手段】下記成分(A)~(C)を含有する液体口腔用組成物。(A)カルシウムイオン供給化合物 0.005~1質量%、(B)カチオン性殺菌剤、(C)下記(C1)及び(C2)を含む非イオン性界面活性剤、(C1)ポリグリセリン脂肪酸エステル(C2)(C1)以外のHLB16~20の非イオン性界面活性剤。【選択図】なし