The present invention provides an adhesive composition including a resin and an electro-conductive material, wherein the electro-conductive material is an ammonium salt of fluorosulfonic acid having 5 or more carbon atoms shown by the general formula (1)； (R1-X-Z-SO3-)nMn+(1), wherein , R1represents a monovalent hydrocarbon group having 1 to 40 carbon atoms and optionally substituted by a heteroatom or optionally interposed by a heteroatom； X represents any of a single bond, an ether group, an ester group, and an amide group； Z represents an alkylene group having 2 to 4 carbon atoms, containing 1 to 6 fluorine atoms, and optionally containing a carbonyl group； Mn+represents a cation having one or two ammonium cation structures. This can form a living body contact layer for a bio-electrode with excellent electric conductivity, biocompatibility, and light weight, which can be manufactured at low cost and does not cause large lowering of the electric conductivity even when it is wetted with water or dried.本發明提供一種黏著劑組成物，能形成導電性及生物體適合性優異，輕量，且能以低成本製造，即便被水沾濕即便實施乾燥導電性也不會大幅降低的生物體電極用的生物體接觸層。一種黏著劑組成物，含有樹脂及導電性材料，該導電性材料為下列通式(1)表示之碳數5以上之氟磺酸的銨鹽。 (R1-X-Z-SO3-)nMn+(1) (R1為也可經雜原子取代、也可插入雜原子之碳數1~40之一價烴基。X為單鍵、醚基、酯基、及醯胺基中之任一者。Z為含1~6個氟原子之碳數2~4之伸烷基，也可含有羰基。Mn+為具有1個或2個銨陽離子結構的陽離子。)
