Epoxy resin adhesive agent

Provided is an epoxy resin adhesive agent having low shrinkability and excellent adhesiveness. An epoxy resin adhesive agent comprising (A) an epoxy resin, (B) a curing agent and (C) polyolefin resin particles having a volume average particle diameter of 1 to 25 μm, wherein each of the polyolefin resin particles has a spherical shape and the polyolefin resin particles are contained in an amount of 1 to 50 parts by mass relative to 100 parts by mass of the epoxy resin.