The life and scientific activity of an outstanding scientist-physiologist Semen Andriyovych Komarov is described in the article. He was a bright representative of the scientific school of professor
Boris Petrovich Babkin (1877–1950), a follower of the great I. P. Pavlov. The scientific researches and achievements of S. Komarov as a pedantic experimenter are highlighted. A great contribution of a researcher to development of physiology, and in particular gastroenterology as a science, is presented.
