The suicide of Sylvia Plath is examined from the perspectives of 15 theories of suicidal behaviour including: Adler, Beck, Binswanger, Freud, Henry & Short, Jung, Kelly, Leenaars, Lester, Maris, Menninger, Murray, Shneidman, Sullivan, & Zilboorg. Plath’s suicide is found to fit best with psychoanalytic & cognitive theories of suicide, in particular those of Aaron Beck, Henry Murray, & Edwin Shneidman. (9 refs.)