Louis Pasteur is considered one of the world’s greatest scientists. However, some cracks in the Pasteur’s monument have been spotted. His character and certain activities are subject to criticism or at least controversy. The review of achievements of the French scientist, contained in this article, prepared on the occasion of the bicentenary of his birth, shows that, despite the accusations formulated from different sides, Pasteur fully deserves to be called a “benefactor of mankind”.