Provided is an electrically conductive fiber structure that is capable of maintaining high electric conductivity even after repeated laundering and can be used for biosignal-acquiring electrodes. This electrically conductive fiber structure is configured from a woven or knitted fabric, etc. comprising an electrically conductive polymer. The electrically conductive fiber structure is characterized in that an electrically conductive resin comprising the electrically conductive polymer is loaded in gaps between single fibers configuring the fiber structure and when a thickness direction cross-section of the fiber structure is examined, the area ratio of the electrically conductive resin present in the region that is 15-30 µm from the surface layer is at least 15%.
