To provide a dental repairing material composition suitably utilizable for resin-based prosthetic materials such as resin for tooth crown, artificial tooth and resin inlay and resin-based filler such as composite resin and sealant and excellent in mechanical properties, kneading of paste and operability of cavity-filling property, X ray impermeability, etc.

The dental repairing material composition comprises (A) a polymerizable monomer, (B) inorganic oxide powder having 0.2-10 μm particle diameter, in which radiation-impermeability of inorganic oxide having 2 mm thickness is ≥1 mm (in accordance with ISO 4049) based on aluminum equivalent, (C) polymer/inorganic oxide composite powder having 0.05-100 μm average particle diameter and obtained by coating inorganic oxide powder having 0.001-10 μm particle diameter with a cured material of a polymerizable monomer, (D) inorganic powder having ≥0.001 μm and <0.2 μm average particle and (E) a polymerization initiator.

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