To provide a composite optical fiber overhead ground cable capable of being used as a non-sacrificial anode in which anti-corrosion lasts semi- permanently.

A substance to lower the immersing potential at the surface of a composite optical fiber overhead ground cable 10 or the surface of an element wire under the passivitation potential is generated again, is applied to, embedded in, or wound round an aluminum-covered steel wire 11 as an element wire and a metal pipe 13 for insertion of an optical fiber 14, and thereby the metal surface is subjected to cathode corrosion prevention so that the anti-corrosion ability is not impaired by eventually even defects exist. The substance 12 to lower the immersing potential at the surface of the ground wire 10 or the surface of element wire under the passivitation potential is obtained again is of titanium oxide series.