To provide an organic caking additive composition for a mold which is considered for an environment by improving the bench life of a kneaded sand by reducing the influence of a bivalent metal salt, alleviating the influence of the bench life in the case of storing the bivalent metal salt in a foundry sand containing a recovered sand and/or a regenerated sand, further prolonging the recycling life of the foundry sand to perform a resource conservation or the reduction in an industrial waste of the foundry sand, and reducing the influence to a natural environment such as a soil contamination or the like even in the case of embedding the waste containing the bivalent metal salt of a lead, a zinc or the like generated in the case of recovering or regenerating the foundry sand.

The organic caking additive composition for the mold comprises an organic solvent solution containing a phenolic resin component and a polyisocyanate component in such a manner that the phenolic resin component contains a benzyl ether type phenolic resin obtained by the bivalent metal salt catalytic reaction of a phenol and the like with an aldehyde and the like so that the content of the bivalent metal salt is 50 ppm or less in terms of a metal element.