The Ni Una Menos movement emerged in 2015, and rapidly turned into a key political force in Argentine society in the fight for women’s rights, and against gender-based violence. This study seeks to explore the Ni Una Menos movement from a participant perspective. It examines important characteristics of the Ni Una Menos movement. Specifically, the political and ideological focus of the movement, tools of protest and why individuals choose to participate. Additionally, it attempts to deepen the understanding of the dynamics of the movement with the state, the church and media. These three institutions are essential in Argentine society, and thus affect the movement’s ability to change the status quo. Finally, remarks on the participant’s views of the movement’s impact so far will be presented. This thesis is a qualitative study, where in-depth interviews have been used to understand how the activists themselves make sense of the Ni Una Menos movement. The informants are 16 activists from the Ni Una Menos movement in Buenos Aires, Argentina. The study’s most important findings show that Ni Una Menos is defined by the majority of my informants as a social movement and its core is a collective fight for women´s rights, specifically for women´s right to safety. The movement´s key tools for protest are mass demonstrations and social media, and thus it fits into the fourth wave of feminism. The reasons individuals choose to participate in the movement are multiple; Social discontent, a prosper political context, increased resources and organization, an increased sense of shared identity and a wish to generate solidarity and transform society. As regards to the church, the state and the media, the findings suggest that the church is most contra productive for the movement, while the media is used as an important tool for change. The movement is perhaps the most complex in its relation to the state, as it is at times in direct opposition, but simultaneously essential for real change. Furthermore, the relationship between the movement and the state has become more conflictual since the new right-wing government came to power. Finally, the interviewees describe three kinds of positive change as a result of the movement: Awareness around gender-based violence and other gender issues, a more gender conscious terminology and women´s empowerment.