The purpose of the present invention is to provide an oral composition that possesses an excellent teeth remineralization promoting effect and that is capable of effectively promoting teeth remineralization even when retained in the oral cavity for a short period of time. An oral composition in which (A) an organic acid calcium salt, (B) a fluoride, and (C) a basic peptide and/or a basic protein in which 60% or more of the constituent amino acid residues are basic amino acid residues are added in combination is capable of dramatically promoting teeth remineralization as a result of a synergetic effect of these components and is capable of effectively promoting teeth remineralization even when retained in the oral cavity for a short period of time.本發明之目的在於提供一種口腔用組成物，其具有優異的促進牙齒再礦化之效果，且即便僅使其在口腔內短時間滯留，仍可有效促進牙齒的再礦化。 組合並摻合有(A)有機酸鈣鹽、(B)氟化物以及(C)構成胺基酸殘基之60%以上為鹼性胺基酸殘基的鹼性胜肽及/或鹼性蛋白質的口腔用組成物透過該等成分之協同效果，可大幅度的促進牙齒的再礦化，且即便僅使其在口腔內短時間滯留，仍可有效促進牙齒的再礦化。
