Tennessee Williams's A Streetcar Named Desire shows layers of aspects in violence represented by the power struggles between Stanley and Blanche. As they were born and grown up in a completely different environment, they inevitably create a conflict and conflict with each other on everything. Namely, Blanche from the Southern nobility and Stanley from Polish emigrant working class inevitably come in conflict with each other. Patriarchal Stanley seeks the material amenities of life, and thinks of Blanche as a threatening person who destroys his family and his own community as well. In A Streetcar Named Desire, Blanche's illusory world consistently collides with Stanley's real world. To Blanche, the real world is just a series of sufferings such as ex-husband's sexual perversion and his suicide, the loss of Belle Reve, and the following sexual disorders. Thus, she excessively holds fast to her dreamy world to avoid the pains of the stern realties of life. On the other hand, to Stanley, nothing is more important than the material amenities of life and physical comfort. He destroys Blanche's sensitive fragile illusory world. And then drives her to despair physically and emotionally through his violence and brutality. In previous studies on A Streetcar Named Desire, the conflict between Stanley and Blanche has been summed up as ‘a clash of different civilizations.' Thus, Stanley's violence against Blanche has been regarded as legitimately defending modern American culture against the Southern nobility. Even his raping Blanche has been justified partially. But exactly speaking, Stanley's violent behaviors arise not from a noble cause of protecting modern civilization but from selfish snobbery. In this study, I investigated a diversity of aspects of patriarchal violence imposed by a male-dominated society through the power struggles between Stanley and Blanche in A Streetcar Named Desire. In fact, the violence is not merely a way of pushing out human's immediate feelings. Instead, it is a kind of tangible and intangible strategic arms of procuring hegemony, which contains a political undertone. The violence is a theme of modern or contemporary American plays including A Streetcar Named Desire.