There are five parts in the article: introduction, the effects of Puritanism on the protagonist that lead to her tragedies, individual defiance, further study about the story and conclusion. The article is aimed to solve the problem of “A Puritan Tragedy” embodied in the story “the Stone Angel” by Margaret Laurence. The author’s theme “A Puritan Tragedy” will be analyzed from two aspects: the effects of Puritanism on the protagonist that lead to her tragedies, and individual defiance. The present author will use such research methods as literature research method, exemlification, inductive method and analisis. Characters in The Stone Angel, will be taken as examples to illustrate the author’s theme. The article is concluded that “A Puritan Tragedy” embodied in the story “the Stone Angel” by Margaret Laurence stems from the religious climates. What is new in this paper is that reasons resulting to tragedy are from Puritanism on the protagonist and her own defiance.