The study deals with the conception of personal immortality in Miguel de Unamuno’s works. The starting point of his reflections is a particular person of “flesh and blood“ and his authentic existence. Unamuno’s “hunger of immortality“ is inspired by man’s confrontation with the phenomenon of death. For Unamuno existential phenomena of suffering and anxiety seem to be the keyword to the authentic existence and God then becomes a guarantor of individual immortality. The study concentrates on Unamuno’s conception of God in (...) the spirit of panentheism and Spanish Krausism. It observes Unamuno’s philosophical sources of information when discussing the question of immortality from Pythagoras to Platon while opposing the views of impersonal immortality (e.g. B. Spinoza). His theological argumentation is based mainly on S. Kierkegaard, St. Paul and Spanish mystics. His philosophical ideas are extracted especially from his works The Tragic Sense of Life, The Agony of Christianity and The Intimate Diary. His novella Saint Emmanuel The Good, Martyr serves as a fictional illustration of his ideas. The study concludes with the evaluation of Unamuno as an author writing “philosophizing literature“ and as a predecessor of existentialist literature, who was orientated towards Christian personalism. (shrink)