PROBLEM TO BE SOLVED: To provide a production method of a composition for oral cavity suppressing lump occurrence in mixing sodium lauryl sulfate with a composition for oral cavity containing potassium nitrate so as to give good formulation appearance and formulation with good fragrance and excellent liquid separation stability.SOLUTION: A production method of a composition for oral cavity is characterized by adding equal to or less than 10 mass% of an aqueous sodium lauryl sulfate solution with a concentration of 15-27 mass% to a composition for oral cavity containing potassium nitrate, followed by mixing.COPYRIGHT: (C)2014,JPO&INPIT【課題】硝酸カリウムを含有する口腔用組成物にラウリル硫酸ナトリウムを配合するに際し、ダマの発生を抑えて良好な製剤外観を与え、また、香り立ちが良く、液分離安定性に優れる製剤を与える口腔用組成物の製造方法を提供する。【解決手段】硝酸カリウムを含有する口腔用組成物に、15~27質量%濃度のラウリル硫酸ナトリウム水溶液を10質量%以下添加、配合することを特徴とする口腔用組成物の製造方法。【選択図】なし