The dissertation consists on the analysis of the condition of intersectional invisibility of the girls in conflict with the law, particularly those who are deprived of their liberty. Studies that investigate the imprisoned girls lives offer inputs for a better comprehension on how they face the violation of rights and violence, focusing on their experience and interface with the juvenile justice system. Applying an intersectional lens, the correlation between the oppressions experienced by the girls due to their age, gender, class and race are highlighted. The acknowledgment of age as a social marker of difference is advocated having as a basis the approach between the intersectionality theory and the childhood sociology studies. Lastly, the analysis of the public policies aimed to women in prison and to boys in conflict with the law outlines the absence of initiatives targeted at girls and indicates possible paths for their protection.