The present invention provides a bio-electrode composition including: a resin having a urethane bond and a silicone chain in the main chain； and an electro-conductive material, wherein the electro-conductive material is a polymer compound having one or more repeating units selected from fluorosulfonic acid salts shown by the following formula (1)-1, fluorosulfonic acid salts shown by the following formula (1)-2, sulfonimide salts shown by the following formula (1)-3, and sulfonamide salts shown by the following formula (1)-4. This can form a living body contact layer for a bio-electrode that is excellent in electric conductivity and biocompatibility, light in weight, manufacturable at low cost, and free from large lowering of the electric conductivity even when it is wetted with water or dried. The present invention also provides a bio-electrode in which the living body contact layer is formed from the bio-electrode composition, and a method for manufacturing the bio-electrode.本發明提供可形成導電性及生物相容性優異，輕量，且能以低成本製造，無論被水沾濕或予以乾燥，導電性也不會大幅降低的生物體電極用之生物體接觸層的生物體電極組成物、使用該生物體電極組成物而形成有生物體接觸層的生物體電極、及該生物體電極之製造方法。一種生物體電極組成物，含有於主鏈具有胺甲酸酯鍵及聚矽氧鏈之樹脂與導電性材料，該導電性材料為具有選自於下列式(1)-1、(1)-2表示之氟磺酸之鹽、(1)-3表示之磺醯亞胺之鹽、及(1)-4表示之磺醯胺之鹽中之1種以上之重複單元的高分子化合物。[化1]
