A resin emulsion for a damping paint, comprising a (meth)acrylic resin particle including: a particle obtained by polymerizing a monomer component containing 50% by mass or more of a (meth)acrylic acid ester; and an adsorbed protective layer obtained by allowing a polycarboxylic acid-based polymer compound having a structural unit derived from a carboxylic acid, or a salt or anhydride thereof to be adsorbed onto a surface of the particle, wherein the (meth)acrylic resin particle has a ratio of an average particle diameter D A by means of a laser diffraction/scattering method to an average particle diameter D B by means of a dynamic light scattering method, D A /D B , of less than 1, wherein the average particle diameter D A is the particle diameter (D 50 ) at which cumulation reaches 50% in the particle size distribution on a volume basis when the refractive index is 1.45 - 0.5i, and which is measured for the resin particles in the resin emulsion using a particle size distribution measurement apparatus utilizing a laser diffraction/scattering method, as described in the description, wherein the average particle diameter D B is the particle diameter (D 50 ) at which cumulation reaches 50% in the particle size distribution on a volume basis, and which is measured for resin particles in the resin emulsion using a particle size distribution measurement apparatus utilizing a dynamic light scattering method, as described in the description, and wherein the polycarboxylic acid-based polymer compound has a weight average molecular weight of 5,000 or more and 1,000,000 or less, wherein the weight average molecular weight is measured by gel permeation chromatography using polyethylene glycol as a standard substance. a particle obtained by polymerizing a monomer component containing 50% by mass or more of a (meth)acrylic acid ester; and an adsorbed protective layer obtained by allowing a polycarboxylic acid-based polymer compound having a structural unit derived from a carboxylic acid, or a salt or anhydride thereof to be adsorbed onto a surface of the particle, wherein the (meth)acrylic resin particle has a ratio of an average particle diameter D A by means of a laser diffraction/scattering method to an average particle diameter D B by means of a dynamic light scattering method, D A /D B , of less than 1, wherein the average particle diameter D A is the particle diameter (D 50 ) at which cumulation reaches 50% in the particle size distribution on a volume basis when the refractive index is 1.45 - 0.5i, and which is measured for the resin particles in the resin emulsion using a particle size distribution measurement apparatus utilizing a laser diffraction/scattering method, as described in the description, wherein the average particle diameter D B is the particle diameter (D 50 ) at which cumulation reaches 50% in the particle size distribution on a volume basis, and which is measured for resin particles in the resin emulsion using a particle size distribution measurement apparatus utilizing a dynamic light scattering method, as described in the description, and wherein the polycarboxylic acid-based polymer compound has a weight average molecular weight of 5,000 or more and 1,000,000 or less, wherein the weight average molecular weight is measured by gel permeation chromatography using polyethylene glycol as a standard substance. <EOS>