The present invention provides an emulsion composition for vibration damping materials which is capable of giving water-based vibration damping materials exhibiting very satisfactory thermal drying characteristics and vibration damping properties through improved dispersibility and stability and an emulsion composition for chipping-resistant materials which is capable of giving water-based chipping-resistant materials exhibiting satisfactory thermal drying characteristics and chipping-resistant properties. It also is directed to an emulsion composition for vibration damping materials which comprises an emulsion obtained by polymerizing a monomer composition containing an unsaturated carboxylic acid monomer as an essential component and a crosslinking agent. It further is directed to an emulsion composition for vibration damping materials or chipping-resistant materials which comprises an emulsion obtained by polymerizing a monomer composition containing an unsaturated monomer having two or more functional groups as an essential component.