Introduction: Breastfeeding Self-Efficacy Scale - Short Form (BSES-SF) works as an instrument to assess maternal confidence toward effective breastfeeding. Aims: This study aims to identify mothers’ perception about breastfeeding self-efficacy through the BSES-SF instrument and to build socio demographic and obstetric profiles of the subjects. Method: This descriptive study was conducted with 155 women in a public maternity hospital in Fortaleza-CE, from August to November 2008. Data collection was conducted by interviewing using demographic and obstetric data and the BSES-SF form. Results: We found that 125 (80.6%) mothers showed high self-efficacy to breastfeed. We found a statistically significant association between age and breastfeeding self-efficacy scores (p=0.006), but not between maternal efficacy rates and obstetric history regarding early pregnancy profiles. There was no statistically significant difference among the overall items from two domains (Technical and Intrapersonal Thoughts) regarding the scale item choices. Overall, we found a high maternal breastfeeding self-efficacy rates. Conclusion: The use of the BSES-SF enables health professionals to better recognize maternal confidence toward breastfeeding and to intervene more effectively and accurately in promoting breastfeeding.