Fischer was born in Graz, Styria, which had recently become part of Nazi Germany, following Germany’s annexation of Austria in March 1938. Fischer attended a grammar school which focused on humanities and graduated in 1956. He studied law at the University of Vienna, earning a doctorate in 1961. In 1963, at the age of 25, Fischer spent a year volunteering at Kibbutz Sarid, northern Israel. Apart from being a politician, Fischer also pursued an academic career, and became a professor of Political Science at the University of Innsbruck in 1994.