Henry James, the greatest novelist after Hawthorne and Melville, is one of the starters of psychoanalytical novels, also the founder of stream of consciousness writing technique of 20 th century novel. In general, most of the characters in his novels were born in America then settled down in Europe in which they were confronted with the cultural conflicts between America and Europe that is especially highlighted in his work The American. This thesis makes a summary on behavior of Newman’s personality under the cultural background, which is aimed at guiding us to have a good understanding that one’s personality development is influenced by the environment in social practice. Henry James, the greatest novelist after Hawthorne and Melville, is one of the starters of psychoanalytical novels, also the founder of stream of consciousness writing technique of 20th century novel. In general, most of the characters in his novels were born in America then settled down in Europe in which they were confronted with the cultural conflicts between America and Europe that is especially highlighted in his work The American. This paper makes a summary on behavior of Newman’s personality under the cultural background, which is aimed at guiding us to have a good understanding that one’s personality development is influenced by the environment in social practice.