To provide a liquid oral composition having a good use feeling and showing a good washing effect, and an oral washing method.SOLUTION: A liquid oral composition has a thickener and an abrasive, and has a 20°C viscosity of 20-500 mPa s. A product P of an average particle size D90 (μm) of the abrasive and a concentration C (mass%) of the abrasive is 0.5-10.SELECTED DRAWING: None【課題】使用感が優れ、かつ、優れた洗浄効果を示す液体口腔用組成物および口腔洗浄方法を提供する。【解決手段】増粘剤と研磨剤とを含み、２０℃における粘度が２０～５００ｍＰａ・ｓであり、研磨剤の平均粒子径Ｄ９０（μｍ）と研磨剤の濃度Ｃ（質量％）との積Ｐが０．５～１０である、液体口腔用組成物。【選択図】なし
