The present work investigates, based on the foucautian notion of the constitution of the subjectivity, the practitioners of extreme body marking such as tattooing, piercing, scarification, branding, cutting, suspension, among others. All these practices concern the greater movement of Body Modification. Each society produces different standards for what the ideal body should be according to the patterns of beauty and the dominant values of each particular time. Considering that the body constructed by the practitioners of Body Modification is divergent to western culture standards, this study tries to show how this perspective influences not only those who use it but also how its presence in our society has important consequences. To do so the study began with an exposition of Foucault´s notion of power and how power relations invest the bodies producing different forms of subjectivity. A historic approach on body marking also made it possible to understand in which context the Body Modification Movement and its specificities appeared. The narrative of the individuals who submit to these practices was also taken in consideration, and the main aspects of how they think their experience is presented in this work. Agreeing with Foucault´s premise that subjectivity has its roots on the body, the Body Movement is valued by the author as a new form of subjectivity which can offer an alternative for resistance in face of the coercive mechanisms of power of our contemporaneity.