To provide a dental curable composition used for a dental filling restorative material, a crown prosthesis material such as an inlay, a crown, and a bridge, an abutment construction material, a block material for dental CAD/CAM or the like.SOLUTION: There is provided a dental curable composition which comprises a curable composition (A), a porous inorganic filler (B) and a polymerization initiator (C), wherein the porous inorganic filler (B) is composed of an oxide containing silicon dioxide and at least one other metal element and in the infrared absorption spectrum, the ratio (I/I) between the maximum absorbance (I) in the range of 3730 to 3750 cmand maximum absorbance (I) in the range of 3000 to 3600 cmis 1 or more and 3 or less.SELECTED DRAWING: None【課題】歯科用充填修復材料、インレー、クラウン、ブリッジなどの歯冠補綴材料、支台歯築造用材料、歯科CAD/CAM用ブロック材料などに使用される歯科用硬化性組成物の提供。【解決手段】硬化性樹脂(A)、多孔質無機充填材(B)および重合開始材(C)を含む歯科用硬化性組成物であって、前記多孔質無機充填材(B)は二酸化珪素と、少なくとも1種の他の金属元素を含む酸化物から成り、かつ赤外線吸収スペクトルにおいて、3730から3750cm-1の最大吸光度(I1)と3000から3600cm-1の最大吸光度(I2)の比(I1/I2)が1以上3以下であることを特徴とする歯科用硬化性組成物。【選択図】なし