PROBLEM TO BE SOLVED: To provide a dentifrice composition and a teeth dentinal tubule blocking agent which improve ability of dentinal tubule blocking, stably maintain high dentinal tubule blocking effect after storage, and contain aluminium lactate effective for the prevention of hyperesthesia.SOLUTION: A dentifrice composition comprises: (A) sodium monofluorophosphate (B) sodium dihydrogen phosphate and (C) aluminium lactate, and the mass ratio of ((A) component+(B) component)/(C) component) is 0.10 to 1.0. The dentifrice composition also comprises (D) coconut oil fatty acid amidopropyl betaine. A teeth dentinal tubule blocking agent comprises the (A), (B) and (C) components, and the mass ratio of ((A) component+(B) component)/(C) component) is 0.10 to 1.0. The teeth dentinal tubule blocking agent also comprises the (D) component.
