PROBLEM TO BE SOLVED: To provide a dental curable composition ensuring sufficient operation time for dental treatment and having excellent adhesive strength.SOLUTION: A dental curable composition of the present invention is characterized by comprising (A) a hydroperoxide-based organic peroxide, (B) a thiourea derivative, (C) a polymerizable monomer comprising an acidic group-containing polymerizable monomer and (D) a water-soluble copper compound.