A tooth calcification agent comprising (A) a poorly-soluble acidic calcium phosphate particle, (B) an alkali metal salt of phosphoric acid and (C) water, and is characterized in that the poorly-soluble acidic calcium phosphate particle (A) is at least one selected from the group consisting of an anhydrous calcium monohydrogen phosphate [CaHPO4] particle, a tricalcium phosphate [Ca3(PO4)2] particle, a calcium pyrophosphate [Ca2P2O7] particle, an octacalcium phosphate pentahydrate [Ca8H2(PO4)6·5H2O] particle, a calcium pyrophosphate dihydrate [Ca2P2O7·2H2O] particle and a calcium monohydrogen phosphate dihydrate [CaHPO4·2H2O] particle, the poorly-soluble acidic calcium phosphate particle (A) and the water (C) are contained in amounts of 15-80 parts by weight and 15-84 parts by weight, respectively, relative to 100 parts by weight, i.e., the total amount, of the tooth calcification agent, and the content of the alkali metal salt of phosphoric acid (B) is 0.1-80 parts by weight relative to 100 parts by weight of the poorly-soluble acidic calcium phosphate particle (A). A tooth calcification agent having a high calcification effect can be provided.La présente invention concerne un agent de calcification des dents comprenant (A) une particule de phosphate de calcium acide faiblement soluble, (B) un sel de métal alcalin d'acide phosphorique et (C) de l'eau, et caractérisé en ce que la particule de phosphate de calcium acide faiblement soluble (A) est au moins l'une choisie dans le groupe consistant en une particule de monohydrogénophosphate de calcium anhydre [CaHPO4], une particule de phosphate tricalcique [Ca3(PO4)2], une particule de pyrophosphate de calcium [Ca2P2O7], une particule de phosphate d'octacalcium pentahydraté [Ca8H2(PO4)6·5H2O], une particule de pyrophosphate de calcium dihydraté [Ca2P2O7·2H2O] et une particule de monohydrogénophosphate de calcium dihydraté [CaHPO4·2H2O], la particule de phosphate de calcium acide faiblement soluble (A) et l'eau (C) sont co
