Adhesive composition

An adhesive composition comprising

• (A) 100 parts by weight of at least one rubber component selected from the group consisting of
• (i) unsaturated nitrile-conjugated diene copolymer rubbers prepared by an aqueous suspension polymerization, containing 10-45 wt. % of unsaturated nitrile units in their polymer chains and having a Mooney viscosity (ML.sub.1+4, 100.degree. C.) of 30-100, and
• (ii) hydrogenated unsaturated nitrile-conjugated diene copolymer rubbers obtained by hydrogenating carbon-carbon double bonds in unsaturated nitrile-conjugated diene copolymer rubbers prepared by an aqueous suspension polymerization, containing 10-45 weight percent of unsaturated nitrile units in the polymer chain and having a Mooney viscosity (ML.sub.1+4, 100.degree. C.) of 30-100, said rubber component containing 10 ppm or less of organic and inorganic ions and having an electric conductance of 30 .mu.S/cm as measured on an extractant solution when extracted with deionized water, and (B) 50-500 parts by weight of at least one thermosetting resin selected from the group consisting of phenolic resins and epoxy resins.