PROBLEM TO BE SOLVED: To provide an electrode for a living body to be used for iontophoresis, etc., that can attain cost reduction and excellent pattern accuracy without trouble of peeling, etc., and also to provide a method for manufacturing the electrode for a living body.SOLUTION: An electrode 1 for a living body includes: a flexible base material 2； a first electrode 11 arranged on the flexible base material 2 and having a thickness of &ge；10 nm and &le；300 nm； a second electrode 21 adjacently arranged on the same surface S of the flexible base material 2 where the first electrode 11 is arranged, having a thickness of &ge；10 nm and &le；300 nm, and having a potential difference to generate electromotive force between the first electrode 11 and the second electrode； connection wires 7 extending from one or both of the first electrode 11 and the second electrode 21 and overlapped each other； and an insulation film 4 for covering the connection wires 7. In this case, it is preferable that one of the first electrode 11 and the second electrode 21 is made of noble metal and the other is of zinc or zinc oxide. It is preferable that a primer layer 3 is arranged between the flexible base material 2 and one of or both of the first electrode 11 and the second electrode 21.【課題】コスト低減を実現できると共に、剥離等の問題がなくパターン精度が良好なイオントフォレシス等に用いる生体用電極、及びその製造方法を提供する。【解決手段】フレキシブル基材２と、フレキシブル基材２上に設けられた厚さ１０ｎｍ以上３００ｎｍ以下の第１電極１１と、第１電極１１が設けられたフレキシブル基材２の同一面Ｓに隣接して設けられ、厚さ１０ｎｍ以上３００ｎｍ以下で、第１電極１１との間で起電力が発生する電位差を持つ第２電極２１と、第１電極１１及び第２電極２１の一方又は両方から延びて重なる接続配線７と、接続配線７を覆う絶縁膜４とを有する生体用電極１によって上記課題を解決した。このとき、第１電極１１及び第２電極２１は、一方が貴金属であり、他方が亜鉛又は酸化亜鉛であることが好ましい。フレキシブル基材２と、第１電極１１及び第２電極２１の一方又は両方との間に、プライマー層３が設けられていることが好ましい。【選択図】図１
