Introduction: the Long-Stay Institutions, in majority, are places inappropriate and inadequate to the needs that the elderly have, for physical, social and cognitive nature of activities are scarce in these environments. Objective: evaluating the use of music as therapy for promoting the quality of life of elderly in a Long-Stay Care Institution in the city of Cajazeiras-PB. Method: this is an exploratory and interventional research with a quantitative approach, accomplished with 17 institutionalized elderly. Results: the music used as therapy is an important agent in the improvement of social interaction, in the development of new relationships and emotional bonds, with strong influence in the reestablishment of functional impairments present in the elderly. Conclusion: the institutionalized elderly involved in this work showed improvement of physical, social and cognitive order through the use of music therapy.