The present invention is a bio-electrode including a porous, stretchy base material, an adhesive, conductive film containing silicon, and a conducting path. The conductive film is formed on one surface of the porous, stretchy base material. The conducting path is connected to the conductive film, and penetrates the stretchy base material to be exposed on the opposite side. This enables provision of the bio-electrode that has high sensitivity to a bio-signal and excellent biocompatibility, that is lightweight, that can be produced at low cost, that is free of itching, red spots, and rash of the skin and comfortable even when being wet, dried, or attached to the skin for a long period of time, without a significant decrease in sensitivity to the bio-signal, a production method for the bio-electrode, and a measurement method for a bio-signa