Psychoanalysis is one of the important scientific theories of the twentieth century that was established by Sigmund Freud. Freud introduced some very important concepts such as the unconscious and the role of the suppressed desires to the field of psychology. The purpose of this essay is to shed light on some philosophical and theological studies on psychoanalysis. At First, the view of Karl Popper (1902-1994), a British philosopher, an advocate of analytic philosophy, is analyzed. Next, the view of Jacques Lacan (1901-1981), a French philosopher of the philosophical tradition of continental philosophy and among those who have tendency to post-modern philosophy that introduced psychoanalysis to philosophy, is studied. Finally, the views of Paul Tillich (1886-1955), a German philosopher and Protestant theologian who has influential views about modern theology and special interest in existentialism and psychoanalysis of his theological views, are explored.
)