Context: Although car sharing services represent an alternative for urban mobility and the expansion of practices aimed at sustainability, among the challenges to increasing their offer are the financial viability of the platforms and the change in behavior of individuals around the world. subscribe to such services. Objective: In this sense, the study aims to investigate intentions to use the car sharing service. The application of the research is justified by the fact that there is still an empirical gap to be explored with studies applied in emerging countries, with Brazil being in evidence as it has the largest number of car sharing platforms and users in Latin America. Fortaleza stands out on the national scene, due to its high demographic density and offering different shared economy initiatives in the mobility sector, such as bicycles and automobiles. Methodology: The research used the Theory of Planned Behavior (TCP) as a theoretical framework. Quantitative research, survey style, was carried out using constructs based on the TPB, identifying relationships between attitude, subjective norm and control of perceived behavior that influence the intention to use. In total, six hypotheses were developed. To this end, structural equation modeling was used to test and confirm hypotheses. Results: Regarding the results, it was found that there is a relationship between the subjective norm and the intention to use car sharing. Conclusion: Based on the analysis and discussion of the study, it is possible to focus on the attitudes and behaviors of individuals with issues related to sustainability.