The present invention provides a bio-electrode composition including a silsesquioxane bonded to an N-carbonyl sulfonamide salt, wherein the N-carbonyl sulfonamide salt is shown by the following general formula (1): wherein R1represents a linear, branched, or cyclic alkylene group having 1 to 20 carbon atoms that may have an aromatic group, an ether group, or an ester group, or an arylene group having 6 to 10 carbon atoms； Rf represents a linear, branched, or cyclic alkyl group having 1 to 4 carbon atoms containing at least one fluorine atom； M+is an ion selected from a lithium ion, a sodium ion, a potassium ion, and a silver ion. This can form a living body contact layer for a bio-electrode that is excellent in electric conductivity and biocompatibility, light-weight, manufacturable at low cost, and free from large lowering of the electric conductivity even though it is wetted with water or dried.本發明提供一種生物體電極組成物，其可形成導電性及生物體適合性優異、輕量且能以低成本製造，即使被水沾濕、即使乾燥仍不致導電性大幅下降的生物體電極用之生物體接觸層。一種生物體電極組成物，含有鍵結於N-羰基磺醯胺鹽之倍半矽氧烷，前述N-羰基磺醯胺鹽以下列通式(1)表示。[化1]式中，R1為碳數1～20之直鏈狀、分支狀、環狀之伸烷基，也可以有芳香族基、醚基、酯基，或為碳數6～10之伸芳基。Rf為碳數1～4之直鏈狀、分支狀、環狀之烷基，且有至少1個以上之氟原子。M＋係選自鋰離子、鈉離子、鉀離子、銀離子中之離子。
