PROBLEM TO BE SOLVED: To provide an intraoral dental plaque dispersant that acts effectively from the surface layer to the deep portion of dental plaque and can actualize an excellent dental plaque dispersing effect.SOLUTION: The present invention pertains to an intraoral dental plaque dispersant having as an active ingredient a water-soluble compound (A) having three or more primary hydroxyl groups in the molecular structure and having a chemical formula weight of 100-200 inclusive.SELECTED DRAWING: None【課題】本発明は、歯垢の表層から深部に至るまで有効に作用し、優れた歯垢分散効果を発揮することのできる口腔内歯垢分散剤に関する。【解決手段】本発明は、分子構造中の第１級水酸基の数が３以上であり、かつ化学式量が１００以上２００以下の水溶性化合物（Ａ）を有効成分とする口腔内歯垢分散剤。【選択図】なし
