<;P>;PROBLEM TO BE SOLVED: To provide a one-component tooth surface coating material having extremely high adhesive strength to the tooth surface and, furthermore, forming a cured film excellent in long-term adhesiveness, long-term durability, dentinal tubule sealing property, coating film uniformity, sensuousness, etc., exhibiting excellent storage stability and storable in a state of one-package. <;P>;SOLUTION: The one-component tooth surface coating material stored in the form of one package and directly forming an outer coating on the tooth surface contains: (A) a polymerizable monomer component containing &ge;5 mass% of a polymerizable monomer containing an acidic group; (B) a polyvalent metal ion; (C) a water-soluble volatile organic solvent; (D) water; (E) fumed silica; and (F) an active amount of a photopolymerization initiator, at specific ratios, respectively. <;P>;COPYRIGHT: (C)2010,JPO&INPIT