The dental restorative material composition has excellent operability in a paste state before curing and the cured product has light diffusibility and transparency. A polymerizable monomer, a polymerization initiator, an inorganic filler (C) having an average particle diameter of 0.1 to 1 m, an organic / inorganic composite filler (D) having an average particle diameter of 1 m or more and less than 10 m, an average particle diameter of 10 to 50 m And the absolute value of the difference between the refractive index (Cd) of the inorganic filler (C) and the refractive index (Ad) of the polymer of the polymerizable monomer is 0.01 or less , The absolute value of the difference between either one of the refractive index (Dd) of the organic-inorganic composite filler (D) or the refractive index (Ed) of the organic-inorganic composite filler (E) and the refractive index (Ad) is not more than 0.01 , And the absolute value of the difference between the refractive index of the other and the refractive index (Ad) is 0.03 or more.硬化前のペースト状態における操作性が良好であり、硬化物が光拡散性と透明性とを有する、歯科用修復材組成物を提供する。重合性単量体、重合開始剤、平均粒子径が0.1~1μmの無機フィラー(C)、平均粒子径が1μm以上10μm未満の有機無機複合フィラー(D)、平均粒子径が10~50μmの有機無機複合フィラー(E)を含み、無機フィラー(C)の屈折率(Cd)と重合性単量体の重合体の屈折率(Ad)との差の絶対値が0.01以下であり、有機無機複合フィラー(D)の屈折率(Dd)又は有機無機複合フィラー(E)の屈折率(Ed)のいずれか一方と、屈折率(Ad)との差の絶対値が0.01以下であり、かつ、他方の屈折率と屈折率(Ad)との差の絶対値が0.03以上である歯科用修復材組成物とする。
