readily mixed together further if close kneading of the mixture is required conventionally known kneading machines and methods may be properly employed the blending ratio of vgcf to the matrix compound normally ranges 1 to 80 by weight though depending on a shape of vgcf a kind or a property of matrix compound and others if the blending ratio is below 1 by weight the carbon thread thereof fails to have sufficiently high conductivity if it is over 80 by weight producing uniform carbon threads is difficult to obtain the thread like form of the above mixture in the present invention the mixture is extruded and spun from a spinning nozzle by means of the melt spinning or the solution spinning the spun thread may be stretched to enhance the orientation of vgcf with necessity when the pitch or the thermoplastic resins such as polyvinyl chloride etc are used as the matrix compound the spun thread thereof is heat treated for example at a temperature below 600 u00b0 c in air for the infusible treatment and further baked for example at a temperature lower than 2000 u00b0 c in an inert gas atmosphere to form the carbon thread also when the thermosetting resins are used as the matrix compound providing the mixture of liquid form the liquid mixture may be impregnated with and adhered to a core material of heat resisting fibers such as glass fibers carbon fibers aramid fibers etc the thus obtained thread like element is carbonized in the same method as described above to provide the carbonized thread the.