Abstract: The fairs constitute a form of retail market located outdoors, mainly characterized by the commercialization of the production of small farmers. May constitute an important space for the promotion of healthy eating through trade of vegetables and fruits, such as by encouraging sustainable practices. The aim of this study was to characterize the fairs and analyze sustainable practices in the marketing of fresh fruits and vegetables in the city of Florianópolis, SC. We conducted a study of census type in free markets that sell fresh fruits and vegetables registered in the municipality of Florianópolis, SC, in the first half of 2014 25 fairs, totaling 31 stalls were analyzed. The instrument for data collection was divided into two blocks. Block A, concerning the characterization of the fairs and the general characteristics of the fairground. The block B contained questions related to the variable sustainable practices in the marketing of fresh fruits and vegetables in the free markets. Fairs were found located in diverse places of the city and days of the week in order to facilitate consumer access. The elderly audience were consumers who most frequented the fairs (83.9%). Most stallholders were male (77.4%), with primary education or completed high school (96.7%) and mean age of 49 years. Only 6.4% of merchants reported difficulties in finding fairs, mainly related to the lack of local support and lack of basic structure. For most merchants (93.5%) free fair was the only source of family income. Can perceive a shortage of stalls which marketed fresh fruits and vegetables organic (19.3%). However, these were from organic food production itself, unlike conventional foods that were from Central Supply (Ceasa). It was found the similarity between the prices of conventional foods marketed in different regions as well as the prices of organic foods. Among the main types of packaging of fresh fruits and vegetables, predominant plastic bag (100.0%) and polystyrene with plastic wrap (48.4%). In addition, there were available in all newsstands packaging for consumers realize the purchase, and the principal was quoted plastic bag (54.8%). Situated in the island region of Florianópolis, SC, it can be seen that free markets can constitute spaces to encourage a healthier diet, due to the availability of fresh fruits and vegetables. However, a limitation was identified as sustainable practices carried out by stallholders may compromise the Food Security and Nutrition. However, the incentive to produce organic showed up as an important strategy for promoting environmental sustainability. To this end, greater appreciation of this type of trade, mainly greater recognition of public agencies across the importance of free markets, in order to steadily strengthen this mode of marketing is necessary.