The paper summarises geological and palaeobotanical investigation data on Pleistocene of recent decades in Lithuania and Belarus. The main problems in Pleistocene stratigraphy and correlation of sections are discussed. As a result, the chronostratigraphical correlation chart of Pleistocene deposits is presented and some changes in local stratigraphic schemes are proposed. The main stratigraphical units are comparable and correlate well; however some unsolved stratigraphical problems still exist. The lack of the absolute chronology dates of the Pleistocene deposits of Belarus and the controversial dating results of some sections in Lithuania is still the main problem.