In this study we are dealing with one of these great dramatists, namely Eugene O’Neill. O’Neill is considered the father of modern American drama. He believes that the dramatist should know no limitation in his works; he should try everything that can be dramatized, he also believes that the playwright ought not to restrict himself to one type of writing, he should be experimental. O’Neill himself did not stick to one type of writing he was innovative in his works. He made use of such modern European tides and schools as naturalism, expressionism, realism and others. The present study aims at tracing the dramatic experiments in O’Neill’s play Anna Christie (1922) and bringing these elements to the surface to be analyzed. This paper focuses on naturalism as a literary movement that originated in France in the nineteenth century; then it explains the naturalistic elements in O’Neill’s play Anna Christie (1922) that won the Pulitzer Prize.