The Ni Una Menos (Not One Less) movement was a march of over 200,000 people that took place in front of the Argentine National Congress in Buenos Aires, Argentina on June 3, 2015. A group of Argentine women journalists organized this march to focus national attention on the need to combat femicide (the misogynistic killing of women) in Argentina as the death rate estimated that one woman was killed by a man every thirty hours. Mobilization for the movement emerged through the social media platform, Twitter, which served a vital role in the dissemination of the message and slogan of Ni Una Menos along with the organization for the march. I analyzed La Nación’s coverage from May 12, 2015 to December 4, 2015 using MAXQDA, a qualitative content analysis software, to collect information, testimonials, and the overall coverage of the new media movement and massive mobilizations of Ni Una Menos. In using the Ni Una Menos movement as a case study represented in La Nación, this thesis contextualizes the role of new and traditional media coverage in bringing awareness to this specific movement and to the problematic of femicide in Argentina. This thesis also shows how gender violence and femicide became more visible as problems in Argentina because of the Ni Una Menos campaign. I suggest that La Nación’s inclusion and portrayal of women’s voices and perspectives on gender violence and femicide challenge previously established arguments about how traditional media has sidelined women’s voices and perspectives regarding gender violence. This work illustrates that by documenting the Ni Una Menos movement and placing the problematic of invisibility at its focus, La Nación’s coverage of the campaign reinforced and substantiated the calls for change in Argentina surrounding gender violence and femicide. The timing of these calls for change were crucial because October 2015 was a presidential election year that could end the twelve-year reign of the current ruling party. La Nación also had political motivations in reporting on Ni Una Menos because it could indirectly criticize the current ruling party through its coverage.