An electric conductor for electrodes composed of a carbon fiber felt has
low felt density and a great number of pores so that it can retain a
cathodic reactant such as molten sulphur. The electric conductor is
manufactured by forming a lap by mixing and locking together relatively
large amount of a flame-resistance fiber and relatively small amount of
an organic fiber, orienting fibers of the layered lap in the direction of
a thickness by needle-punching to felt the layered lap and baking the
felt thus obtained at 1100 to 2000.degree. C. whereby the flame-resistant
fiber is carbonized and then the organic fiber is so incinerated that
solid thereof is almost transpired.