The present invention relates to a liquid oral composition which can exert excellent cleaning ability to remove tartar firmly attached to the tooth surface, and can also effectively inhibit the attachment of tartar to the tooth surface. That is, the present invention relates to a liquid oral composition containing the following components (A) and (B):(A) At least part of fatty acids containing unsaturated fatty acids and having hydrocarbon groups with a carbon number of 10 or more and 22 or less(B) One or more basic compounds selected from organic amines, alkali metal hydroxides, carbonates, bicarbonates, and sesquicarbonates,And the pH of the liquid oral composition at 25°C is 9.6 or more and 11 or less.本發明係關於一種液體口腔用組合物，其可發揮優異之洗淨能力而將牢固地附著於牙面之牙垢去除，並且亦可有效地抑制牙垢附著於牙面。即，本發明係關於一種液體口腔用組合物，其含有以下之成分(A)及(B)：(A)至少一部分含有不飽和脂肪酸之具有碳數10以上22以下之烴基之脂肪酸(B)選自有機胺、鹼金屬氫氧化物、碳酸鹽、碳酸氫鹽、及倍半碳酸鹽之1種或2種以上鹼性化合物，且該液體口腔用組合物於25℃下之pH值為9.6以上11以下。
