Siegfried Buback (January 3, 1920 – April 7, 1977) was the chief federal prosecutor from 1974-1977 for the Bundesgerichtshof, the highest court of appeals in Germany.

He decidedly opposed the Red Army Faction during his term and became the first victim of the "German Autumn"; along with his driver, Wolfgang Göbel, and a judicial officer, Georg Wurster, he was shot by members of RAF while travelling from his home in Neureut to the Bundesgerichthof in Karlsruhe.