Psychoanalysis differs from other theories because of the great significance it attributes to a man 's unconscious. Psychoanalysis differs fundamentally from other therapeutic methods in its use of free association and the significance and power it gives to this method when investigating unconscious phenomena. The present article begins with a brief review of the history of free association and its use as a method. After that, I discuss the relationship between free association and memory, neuropsychoanalysis and semiotics. Free association is linked with implicit memory and seen as a way of remembering; unconscious experiences are given a verbal form with the help of free association. The psychoanalytical setting and transference together constitute a psychic space, in which it becomes possible for the patient to get into touch with his or her bodily, psychic and verbal experiences and material simultaneously. The author sees free association specifically as a form of mental processing which is typical to psychoanalysis; it is a core process where the experiences of mind, body and language and their expressions link together. Free association is simultaneously the result of a memory activity and creative activity and, above all, a combination or synthesis of these two processes.