Аннотация:This research assesses the manifestation of women within union organizations and their impact within the categories of professional and social transformation, from 2000 to 2020.Female invisibility in unions is notable despite their active participation.This invisibility demands recognition and it's place in history, necessitating not a retelling but the building of a new narrative.Building on this concept, the experiences of female participation at both executive board level and in the presidency of the 'Union of Bank Workers of São Paulo, Osasco and Region' are analyzed from the perspective of the Social Reproduction Theory, anchored in Marxist feminism thought.This theory focuses on the centrality of social reproduction for the capitalist system.The theoretical reflections reached are empirically based both on union documents, as well as semi-structured interviews with the unionists.The correlations of theory and practice that constitute the inclusion of social reproductive thought are presented in the scope of the union debate, including advances contained in the clauses of the Collective Labor Convention, in 'Folha Bancária', trade union newspaper, and in union practice.Simultaneously, exposing the tension of the legal practice constituting these ideas and consider that both feminism and syndicalism are political fields in dispute within their historical movements.