Objective: To determine the frequency of bacterial vaginosis inpatients presenting with vaginal discharge in Gynaecological outpatient department. Place and Duration ofStudy: From July 2001 to April 2002 in the Gynaecological clinic of Unit-II at Services Hospital. Subject andMethods: Five hundred patients with vaginal discharge were selected for study. They were evaluated usingclinical composite criteria, whiff test, pH metry and microscopy for clue cells on wet mount. Bacterial vaginosiswas diagnosed if any three of the four characters were present Results: The overall frequency of bacterialvaginosis was 27%, 70% had coital frequency of more than twice a week and 40.7% had history of abortions.Conclusion: Bacterial vaginosis was the commonest cause of vaginal discharge in women attending theGynaecological clinic.