This study describes a process of reflection, action and action through Participatory Action Research (IPA). The main objective was to build a collective vision on ageism among Adolescents (A) and Older Persons (OP) belonging to the commune of Villarrica. Through the determination of factors that emerge as contributors of ageism and the actions necessary to eradicate it, from the perspective of the participants. The IAP process meant that both age groups interrelated through 10 intergenerational meetings where the following stages were developed: Evaluation of the problem, problematization, characterization, creative feedback and programming. The main emerging factors of ageism identified by the participants were: educational system, legislative power, cultural values, technologies, labor market, individual factors, and socioeconomic conditions. In turn, the A and OP identified as actions to be carried out to reduce ageism: changes in the family role, raising awareness institutions, educating about OP, capturing the attention of society, increasing instances of communication. The development of participatory methodologies in community interventions, together with the opportunity to have meeting spaces between different generations are a challenge for the region, which allow the co-production of knowledge and actions with, by and between historically excluded groups such as A and OP.