Objective: To evaluate the training of health professionals about breastfeeding. Method: Exploratory and descriptive field study with 614 professionals who were part of the multidisciplinary team of basic care network and two hospitals in the city of Marilia / SP. The collected data were stored and analyzed using the EPI INFO vs.6.02. Results: It was found that 22.6% received no information during training; 51.0% had no training for their professional performance. Most of the professionals assess the situation to identify the problem experienced by a woman, but there are still professionals who support the decision of the breastfeeding mother to stop breastfeeding and suggest the early introduction of other foods. In addition, 50.0% of professionals consider the knowledge about breastfeeding for decision making to be important. Conclusion: This confirms the need for ongoing instruction of our team, through training for the control and management of breastfeeding.