It is an object to provide an oral composition, a food, or a beverage and a remineralizing agent having excellent action of remineralizing demineralized tooth enamel. The present invention is an oral composition, a food, or a beverage comprising sodium chondroitin sulfate and a calcium phosphate. The present invention is a tooth remineralizing agent comprising sodium chondroitin sulfate and a calcium phosphate as active ingredients.
