A retrospective study was made of the previous medical records of 47 infants with congenital syphilis born from mothers with untreated syphilis at Severance Hospital, Yonsei University College of Medicine during the years 1972 through 1983 The VDRL titer of these infants was higher than 1: 8 with reactive FT.A-ABS test. They were subjectd to hematologic examinations and the results were as follow s, 1. Of 46 infants with congenital syphilis, anemia was observed in thirty-one (68%) Reticulocytosis occurred in seventeen(89%) of nineteen infants with congenital syphilis having the mean value of 6. 0%. 3, Of 4.7 infants with congenital syphilis, leucocytosis was noted in seveenteen 4, Thrombocytopenia was observed in twenty (64%) of thirty-one infants with congenital syphilis.