There is provided a composition for oral cavity containing a monofluorophosphoric acid, which can supply calcium ions in a stable manner. The composition comprises (A) a calcium ion-supplying compound which supplies calcium ions at 100 to 16000 ppm, (B) a monofluorophosphate ion-supplying compound which supplies monofluorophosphate ions at 250 to 25000 ppm, and (C) one or more acids selected from the group consisting of lactic acid, malic acid, and tartaric acid, and the composition has a pH of 4 to 6.2.
