Štefan Luby (born 6 May 1941, Bratislava) is a Slovak physicist and senior research fellow at the Slovak Academy of Sciences (SAS). He is doctor honoris causa of University of Salento, Italy, Slovak University of Technology in Bratislava, University of Constantine the Philosopher in Nitra, Slovakia, and in Trenčín, Slovakia. He occupied positions of the director of the Institute of Physics of SAS for nine years and was the president of the SAS for fourteen years (1995–2009). He was the acting president of the All European Academies (federation of European academies of sciences and arts) and the acting president of the Central European Academy of Sciences and Arts. At present, he is a member of Senate and vice-president of the European Academy of Sciences and Arts with the headquarters in