Juliette Favez-Boutonier was born near Grasse, France. Both of her parents were teachers. She attended high school in Nice, then studied philosophy at the Sorbonne, passing the agrégation (competitive civil service teaching exam) in 1926. She taught philosophy in Chartres and Dijon, while also studying medicine. In 1935, she began analysis with René Laforgue in Paris. She graduated with a medical degree in 1938, and earned a doctoral degree in philosophy in 1945. In 1952, she married Georges Favez, a psychoanalyst. She worked for the CNRS, the French National Center for Research, and at the Hôpital Sainte-Anne, which specialized in psychiatry. She went on to become a professor of psychology at the University of Strasbourg, and to hold the chair of general psychology at the University of Paris. She was a pioneer in the recognition of the field of clinical psychology and created the first laboratory of clinical psychology at the Sorbonne, which she directed until her retirement in 1974. She was a co-founder of the Société française de psychanalyse, which she served as president. Her published works included The Notion of Ambivalence (1972).