Streptococcus porcinus is a beta hemolytic streptococcus and was first isolated from swine in the year 1937.It can cause cellulitis, endocarditis, sepsis, cervical lymphadenitis and spontaneous abortions in animals, especially pigs.In humans the microorganism has been isolated from blood, wound, placenta, urine, cervix and vagina.A few case of invasive S. porcinus infections (bacteremia and brain abscess) have been reported to date.In available literature no case of endocarditis caused by S.porcinus was found to date.In this article we present the first reported case of Streptococcus porcinus endocarditis in humans; in a 29-year-old pregnant woman to emphasize that this organism can cause severe infections like infective endocarditis.