Psychology of the Unconscious (German: Psychologie des Unbewussten) is an early work of Carl Jung, first published in 1912.

The English translation by Beatrice M. Hinkle appeared in 1916 under the full title of Psychology of the Unconscious: a study of the transformations and symbolisms of the libido, a contribution to the history of the evolution of thought (London: Kegan Paul Trench Trubner).

The book illustrates a theoretical divergence between Jung and Freud on the nature of the libido, and its publication led to a break in the friendship between the two men, both stating that the other was unable to admit he could possibly be wrong.

Miller, named for her father, was an Alabama-born performer and lecturer who often gave "speeches" in character as various cultural and historical figures.

Jung explains their crucially significant mythological content and portending influence, declaring that Miller exhibited signs of "prodromal" stages of schizophrenia, and predicting that she would eventually suffer a schizophrenic breakdown.