To obtain a resin composition affecting no bad influence to human bodies and environments and having performance with little reduction of adhesive force against a high temperature hot water and provide adhesives for polywoods containing the same.

This resin composition comprises a vinyl acetate-acrylic acid copolymer resin emulsion or a vinyl acetate(meth)acrylic acid ester-acrylic acid copolymer resin emulsion obtained by polymerizing 80.0-99.9 wt.% of (i) vinyl acetate or vinyl acetate and (meth)acrylic acid ester and 0.1-20 wt.% of (ii) acrylic acid as a main component in the presence of a modified polyvinyl alcohol-based copolymer containing 1-10 mole % of ≤4C α-olefin units in a molecule.