To obtain a dental curable composition having no discoloration during curing and excellent preservability in a two-paste dental curing composition causing neither scattering of powder nor inclusion of foam during kneading in use.

The curable composition comprising (1) a non-oxidizing radically polymerizable monomer, (2) a filler, (3) a ternary chemical polymerization initiator composed of a pyrimidine trione derivative, a copper compound soluble in the non-oxidizing radically polymerizable monomer and an organic chlorine salt compound and (4) a tertiary amine compound is dividedly preserved in (A) a paste comprising a non-oxidizing radically polymerizable monomer, a filler, a pyrimidine trione derivative and a tertiary amine compound and (B) a paste comprising a non-oxidizing radically polymerizable monomer, a filler, a copper compound soluble in the non-oxidizing radically polymerizable monomer and an organic chlorine salt compound until immediately before use.

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