Abstract: The Positive Excel lence of Long Day's Journey into Night is a play which marks the climax of Eugene ONeill's literay career. It achieves supremacy over the American theatre in  ts successful descript ion of its character psychological changes and sharp conflicts, in its distinguishable technique and in its tragic sense. The play transcends personal concerns and expresses man’s desire to overc ome loneliness and to live a meaningful life.

Key words: Eugene ONeill, Long Day's Journey into Night, tragic sense