To obtain dentifrice capable of dyeing dental plaque enabling a person to brush teeth while confirming the added place and amount of the dental plaque by imparting dyeability of the plaque to the dentifrice.

This objective dentifrice capable of dyeing dental plaque is obtained by formulating erythrocin, a neutral safflower red solution, phloxine, etc., as dyeing component in a base components (an abrasive, a humectant, a foaming agent, a flavor, a preservative, a hinder, a medicinal component, etc.). The cleansing of the dental plaque is performed while confirming the situation of the added plaque by eyes of oneself.