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The reaction of dihydrohalogen polymerization was suggested by the authors as a method for the preparation of polymers with conjugated double bonds on the basis of α,β‐dihalogen derivatives, oxides, and hydroxides. The reaction was carried out in an autoclave a t 200°C.; the reaction time was 6 hr. Polymers, obtained from α,β‐dibromopropylnitrile, α,β‐dibromopropyl alcohol, and α,β‐dibromoethylbutyl ether, are black and brown powders soluble in concentrated acids. The polymers show a sharp peak in EPR‐spectra characteristic of polyconjugated systems with concentration of paramagnetic particles of 1017–1019/g. The infrared spectra have characteristic absorption bands peculiar to polyconjugated systems.