A new study published in the Journal of Maternal-fetal & Neonatal Medicine investigated the relationship between social support and self-efficacy in prim parous breastfeeding women. This cross-sectional study recruited 300 prim parous breastfeeding mothers, with offspring under 6 months of age, referred to healthcare centers of Mashhad, Iran. Data collection was carried out by demographic form, Breastfeeding Self-efficacy Scale, and perceived social support questionnaire. The results were estimated as follows: the mean score of breastfeeding self-efficacy and social support was 130.89 ± 13.60 and 67.36 ± 5.52, respectively. Stepwise linear regression analysis was used to examine the relationship between social support and breastfeeding self-efficacy. It was found that social support had a significant effect on breastfeeding self-efficacy. The findings indicated that social support was significantly related to the breastfeeding self-efficacy; those with more social support had higher rates of breastfeeding self-efficacy. Thus, it is essential for women to receive support from their social network members, in form of participation and encouragement during breastfeeding.