Taking into account the current situation of the country in terms of building peace and in accordance with the recognized impact of social movements in the process, as well as the interest on the part of researchers to highlight the place of women in this milestone; this research focused on systematizing the experience of Piel Adentro, a collective of women that has opened up its field in the denunciation of gender violence and in the of memory for non-repetition. Taking as reference the approaches of the theory of collective and as categories of main analysis of action and construction of the objective of the thesis was focused on understanding the contributions of the collective from their repertoires of to the process of peacebuilding in the northeastern zone of Medellin, this being a territory where the conflict has been lived and different types of violence against women have been evidenced. This report is divided into 5 chapters that correspond to the presentation of the problem, where antecedents, context, justification, theoretical, contextual, conceptual, and normative frameworks are addressed; the methodology accounts for the rationale and techniques applied, as well as the selection criteria and ethical considerations; the presentation of results according to each specific objective, which specify characteristics of Inside Skin, describe their repertoires of to contribute to the of peace, identify the challenges faced by the collective; and finally, the conclusions and recommendations.