The Scarlet Letter has been recognized by numerous critics as being one of the greatest of American novels.All the aesthetic effects are perfectly fulfilled by the " final" return of the heroin — Hester Prynne.Since her husband and lover have died,her daughter has been married into a noble family of Europe,why does Hester Prynne return to America,and take up her long forsaken shame? The purpose of the article intends to analyze this question.In brief,the decisive factors in regard to the final return of Hester Prynne include many characteristics of Hester Prynne and revealing of social reality.