The present invention pertains to 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. Specifically, 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.本發明係關於一種口腔內齒垢分散劑，其能夠有效地作用於齒垢之表層至深部，發揮出優異之齒垢分散效果。即，本發明係關於一種口腔內齒垢分散劑，其係以分子結構中之1級羥基之數量為3以上，且化學式量為100以上且200以下之水溶性化合物(A)作為有效成分。
