BACKGROUND:Obesity is a pathology that leads to several co-morbidities such as diabetes and hypertension. In Brazil obesity rates (BMI >30kg/m) raised from 11.8% in 2006 to 17.5% in 2013. Bariatric Surgery is the most effective treatment to achieve excess weight lost for morbid patients. It is estimated that Brazil has around 1.8 million people with BMI >40kg/m, considering that Brazil has an universal health care system and 25% of the population relies in the private health care sector, several people are eligible to get bariatric surgery OBJECTIVES: Evaluate the use of the resources dedicated to treat morbid obese patients in the Brazilian public health care system (SUS) from 2008 to 2013  METHODS: Revised data of expenditures, number of surgeries and length of stay related to bariatric surgery in the database of the IT Department of SUS (DATASUS) RESULTS: The number of certified hospitals that perform bariatric surgery increased by 35% and the percentage of states covered by certified hospitals rose from 60% to 74%. During the same period the number of procedures increased by 113%. Despite the increase in the number of procedures by 113%, the days of hospitalization required for surgeries increased only 52%; this is due the average length of stay reduction from 5.7 days to 4.1 days, showing a better efficiency among hospitals. The total expenditure in bariatric surgeries rose by 161%. CONCLUSIONS: Analysis demonstrated that the access to the bariatric procedure in Brazil has increased in the past five years. The hospitals’ efficiency improved during the same period, decreasing the average length of stay. Today the Brazilian public health care system provides surgery to less than 0.75% of the eligible population and despite the access increase; more resources (physicals and infrastructure) are needed in order to treat the morbid obese population