PURPOSE: To obtain an aqueous resin composition for coating, having excellent storage stability, useful as printing ink, a coating compound, a sealant, an adhesive, a surface treating agent, etc.

CONSTITUTION: This aqueous resin composition for coating comprises (A) a resin emulsion containing an aldo group or a keto group obtained by subjecting (b) an ethylenic unsaturated compound containing at least an aldo group or a keto group to emulsion polymerization in the presence of (a) a water-soluble resin prepared by neutralizing an amino group-containing resin with an inorganic or organic acid and (B) a hydrazine derivative containing two or more hydrazine residues in a ratio to give 0.1-5 equivalents of the hydrazine residue based on 1 equivalent of the aldo group or the keto group in the component (A). The aqueous resin composition for coating has excellent physical properties as a cured coating film and excellent storage viscose stability is obtained.