In this project, two types of polybenzimidazoles containing pyridine and phenolic groups has been prepared by condensation polymerization of 4,4'-oxybis(benzene-1,2-diamine) with different dicarboxylic acids such as 5-hydroxy isophthalic acid and pyridine-2,6-dicarboxylic acid. Results showed that polybenzimidazole based on 5-hydroxy isophthalic acid has higher proton conductivity compared with the corresponding polybenzimidazole based on pyridine-2,6-dicarboxylic acid. We came with the results that this higher conductivity can be related to the incorporation phosphonate group on the polymer chain during condensation with poly phosphoricacid due to the presence of the electron-donating phenolic group in the main chain. Then, acidic hydrogens of phenolic and imidazolic groups was separated by sodium hydride and reacted with 3,3'-disulfonated-4,4'-dichlorodiphenyl sulfone to incorporoite sulfonated groups to the polymer chain. The resulting polymers were characterized by FT-IR, 1 H-NMR, CHN and TGA. tudies on the synthesized polymers exhibited that the presence of the sulfonated groups on the polymer backbone increased the proton conductivity of the membrane. The result showed that, these polymers show higher conductivity due to the presence of two phosphonated and sulfonated groups in the polymer chain. In the second part of the project, synthesized diamine containing benzimidazole ring, reacted with different dianhydride and so different poly(benzimidazole-imide)s have been synthesized which showed good proton conductivity. To increase the proton conductivity, benzimidazolic hydrogens separated by sodium hydride and then reacted with sultone. Synthesized polymers had comparable proton conductivity with Naphion. 1 H-NMR, FT-IR, TGA and CHN were used to identify and characterize the sulfonated polymers.