PROBLEM TO BE SOLVED: To provide a composition for oral cavity, which has viscosity enabling to enhance the retention property of the composition in the oral cavity and retaining a medicinally effective ingredient such as a moisturizing agent, and can quickly supply water to the oral cavity to spread the moisture.SOLUTION: The composition for the oral cavity is characterized by compounding a hydrophobic modified polyether urethane and a moisturizing agent the composition for the oral cavity, wherein the composition for the oral cavity is a composition for treating or preventing intraoral xerosis the composition for the oral cavity, wherein the moisturizing agent is at least one selected from the group consisting of sorbitol, glycerol, ethylene glycol, propylene glycol, 1,3-butylene glycol, propane diol, polyethylene glycol, polypropylene glycol, xylitol, maltitol, lactitol, and trehalose.
