Group B Streptococcus is a pathogen commonly responsible for maternal-fetal and neonatal infections. It is the leading cause of death of newborn bacterial infection. The aim of a present study was to identify the capsular types of Group B Streptococcus circulating in Abidjan from newborns gastric fluids. The study included 522 newborns in the delivery room from November 2012 to May 2013 in four general hospitals and a clinic in Abidjan. Only newborns with a maternal infectious context according to National Agency for Accreditation and Health Evaluation were included in study. Capsular types were determined by Polymerase Chain Reaction targeting the types Ia, Ib, II to VIII from gastric fluids. Polymerase Chain Reaction confirmed the presence of Group B Streptococcus in twenty two gastric fluids 4.2% (22/522). Capsular type V was the most common 11/22 (50%). The other capsular types were, in order of frequency the type Ia 13.6% (3/22), type IV with 13.6% (3/22), type II, with 9.1% (2/22) and type III with 9.1% (2/22). One gastric fluid could not be typed. Capsular type V was mostly in the gastric fluids of newborns and the dominant risk factor was stained amniotic fluid.