The literature data concerning «age-dependent» changes in cultured cyanobacteria are reviewed. They are currently studied in two basic experimental systems; 1) the cultures grown without subcultivation under optimal light intensity (with classical S-shape growth curve); 2) those incubated in darkness (cell do not divide at all). We refer to processes occuring in such conditions as «light ageing» and «dark ageing», correspondingly. The alterations of the potential (i. e., revealed in optimal conditions) proliferation capacity and partially of physiology of the «light ageing» cells strongly resemble those occuring during cellular ageing of eukaryotic Methazoan cells both in vitro and in vivo. We conclude that «light» stationary cultures of cyanobacteria seem to be an adequate model for studying the evolutionary aspects of cell ageing.