PROBLEM TO BE SOLVED: To provide an adhesive composition excellent in conductivity and biocompatibility, having light weight, capable of being manufactured at low cost and capable of forming a contact layer with living body for bioelectrode of which conductivity is not largely reduced even when becomes wet with water and is dried.SOLUTION: There is provided an adhesive composition containing a resin and a conductive material, in which the conductive material is one or more kind of salt selected from sodium salt, potassium salt and calcium salt of fluorosulfonic acid having 5 or more carbon atoms, represented by formula (1). (R-X-Y-SO)M(1), where Ris C1-30 monovalent hydrocarbon group which is substituted or included by a hetero atom； X is a single bond, an ether group, an ester group or an amide group, Y is c2-4 alkyl group containing 1-6 fluorine atoms and may contain a carbonyl group, and Mis a sodium ion, a potassium ion or a calcium ion.SELECTED DRAWING: Figure 1【課題】導電性及び生体適合性に優れ、軽量、かつ低コストで製造でき、水に濡れても乾燥しても導電性が大幅に低下しない生体電極用の生体接触層を形成できる粘着剤組成物の提供。【解決手段】樹脂及び導電性材料を含有する粘着剤組成物であって、導電性材料が、式（１）で示される炭素数が５以上のフルオロスルホン酸のナトリウム塩、カリウム塩、及びカルシウム塩から選ばれる１種以上の塩である粘着剤組成物。（Ｒ１－Ｘ－Ｙ－ＳＯ３－）ｎＭｎ＋（１）（Ｒ１はヘテロ原子で置換又は介在していてもよい、Ｃ１～３０の一価炭化水素基；Ｘは単結合、エーテル基、エステル基又はアミド基；Ｙは１～６個のフッ素原子を含むＣ２～４のアルキレン基、カルボニル基を有していてもよい；Ｍｎ＋はナトリウムイオン、カリウムイオン又はカルシウムイオン）【選択図】図１
