Abstract: There is provided a curable composition for dental restoration comprising a vinyl monomer containing not less than 30% by weight of an acid group-containing vinyl monomer represented by the formula ##STR1## wherein R.sup.1 's may be the same or different and each denotes a hydrogen atom or a methyl group, R.sup.2 denotes a trivalent to hexavalent organic residue having 1 to 30 carbon atoms which residue may have an ether linkage and/or an ester linkage, m is an integer of 2 to 4, n is an integer of 1 or 2,an ion dissolving filler that dissolves a polyvalent metallic ion, and a polymerization initiator. Said curable composition features that it shows high adhesion even under humidity, and its cured product has high strength and less coloration.