Smith Ely Jelliffe (October 27, 1866 – September 25, 1945) was an American neurologist, psychiatrist, and psychoanalyst. He lived and practiced in New York City nearly his entire life. Originally trained in botany and pharmacy, Jelliffe switched first to neurology in the mid-1890s then to psychiatry, neuropsychiatry, and ultimately to psychoanalysis.
He graduated from Brooklyn Polytechnic Institute in 1886, and received his M.D. in 1889 from the College of Physicians and Surgeons of Columbia University. He received a Ph.D. from Columbia in 1900, for which he did a Flora of Long Island for his thesis.
Jelliffe was instructor in materia medica in Columbia University and professor of pharmacognosy in the same university. Later he was clinical professor of mental diseases at Fordham University, president of the New York Psychiatric Society, the New York Neurological Society, and the American Psychopathological Association, and editor-in-chief of the Journal of Nervous and Mental Disease. He was also a corresponding member of the French and Brazilian neurological societies.
He was author of more than four hundred articles. His book, The Modern Treatment of Nervous and Mental Diseases, which he co-authored with lifelong collaborator William Alanson White, has been a classic in the field, with many reprintings. With White, Jelliffe in 1913 founded Psychoanalytic Review, the first English-language publication devoted to psychoanalysis. In it, he wrote a number of articles on psychoanalytic technique, daydreams, and transference. A quite heterodox journal (as it still is), the Psychoanalytic Review continued to publish translations of work by dissidents such as C. G. Jung and Alfred Adler long after they had seceded from orthodox Freudianism. Jelliffe is also credited with important contributions in the field of psychosomatic medicine, of which he is regarded as one of the founders. He began publishing papers about it as early as 1916. These were collected in his Sketches in Psychosomatic Medicine (1939), his only book explicitly on this subject.