New polymers containing pyrrole units in the main chain were obtained by chemical modification of diacetylene-containing polymers, which were prepared by oxidative coupling of terminal diacetylenes or superelectrophilic polycondensation of diphenoxydiacetylene with isatin. Diacetylenic fragments in the polymers thus obtained reacted with aromatic amines in the presence of copper chloride to yield the corresponding pyrroles. The reaction between diacetylenic compounds and amines was studied to determine the proper reaction conditions for introduction of pyrrole groups into the polymer backbone. The new polymers and their model compounds were fully characterized by NMR, IR and thermal analysis.