This article analyzes the relationships between rebellious socio-cultural processes and the establishment of legal norms in the context of the elaboration of a new Constitution in Chile (2019-2022). The text interrogates the events that converged in the social outburst in Chile in October 2019 and that gave rise, in a context of great political instability, to an institutional solution demanded by the social movements: the elaboration of a new Constitution through democratic and participatory instances. The analysis highlights the role of feminist movements as a democratic transforming force as well as their incidence in the institutionalization of the Constitutional Convention and in the incorporation of feminist demands in the proposal for a new Constitution. The sources of this analysis are the participant observation of the constituent process, in-depth interviews, intervention in feminist organizations and digital platforms, and information produced by the Constitutional Convention and the monitoring observatories.