To provide a dental calcium silicate hydrate based material suppressing emission property of silicic acid and suppressing initial release of calcium.SOLUTION: There is provided a dental amorphous calcium silicate hydrate based material in which a molar ratio of CaO/SiOis 0.5-1.5 as a chemical composition, and which includes AlOby 0.01-2.5 mass%.SELECTED DRAWING: None【課題】ケイ酸の放出性が制御され、カルシウムの初期放出が抑制された歯科用ケイ酸カルシウム水和物系材料の提供。【解決手段】化学成分としてCaO/SiO2のモル比が0.5~1.5及びAl2O3を0.01~2.5質量%含有する歯科用非晶質ケイ酸カルシウム水和物系材料。【選択図】なし