This paper compares the electrical conductivity of three related conjugated and pseudoconjugated polyazomethine. The polymers were prepared by the condensation of glyoxal with p-phenylene diamine, benzidine and p,p''-diamino-diphenylene ether in DMSO respectively. IR absorption spectroscopy was used to elucidate the structure of polymers. The characteristic peak of polyazomethine, carbon-nitrogen double bond was found to absorb at 1600-1620 cm^-1. It was insoluble in common organic solvents and only slightly soluble in concentrated sulfuric acid . Electrical conductivities of polyazomethines measured by a 4-point probe technique were comparable to that of polyactylene (PA), poly (p-phenylene) (PPP) and polyazine.