We report a case of chorioamnionitis with intact membranes caused by Capnocytophaga sputigena. The pregnant woman was hospitalised in preterm labor without fever, neither tenderness, just regular contractions. In spite of the tocolitic treatment the patient gave birth to a girl at 29 weeks' gestation, weighing 1220 g and transferred to intensive care. The newborn had clinical and biological signs of infections and was initially treated by Ampicillin, cephalosporin and metronidazol. Capnocytophaga sputigena was found on membranes, cord, amniotic fluid and placenta. It was also identified in maternal endocervix culture. Histologic findings showed a focal chorioamnionitis. This was the fourteenth reported case of infection due to Capnocytophaga species occurring in pregnancy. All the cases are reviewed.