To provide a conductive polymer fiber that is excellent in conductivity, strength in both dry condition and humid condition and flexibility, and to provide a biological electrode including the same.SOLUTION: A biological electrode 330 includes: a contact part 332 provided with a contact piece 331 constituted of a conductive polymer fiber； and a substrate 333 for supporting the contact part with one surface thereof.SELECTED DRAWING: Figure 24A【課題】導電性、乾燥状態及び湿潤状態における強度、並びに柔軟性に優れた導電性高分子繊維と、それを備えた生体電極を提供する。【解決手段】導電性複合繊維で構成された接触子３３１が備えられた接触部３３２と、前記接触部を一方の面で支持する基板３３３と、を備えた生体電極３３０。【選択図】図２４Ａ
