Eftichios Bitsakis (Greek: Ευτύχης Μπιτσάκης; 24 August 1927 – 19 August 2025) was a Greek philosopher. A longtime professor at the University of Ioannina, he was a member of the United Panhellenic Organization of Youth during the Greek Resistance. He earned a Doctor of Philosophy from the University of Paris and a Docteur d'État from Paris 8 University in 1976. He also notably taught at the Collège de France. Bitsakis died in Athens on 19 August 2025, at the age of 97.
