To determine the persistence of antibody in goats and maternal antibody in kids after vaccination with peste des petits ruminants (PPR) virus vaccine developed by Bangladesh Livestock Research Institute (BLRI), an experiment was conducted at the Virology Laboratory, Animal Health Research Division, BLRI, Savar, Dhaka. A total of 98 serum samples were collected from 15 PPR vaccinated goats at every six months interval for 4 years. To assess the persistence of maternally derived antibody against PPR virus, blood samples from 5 kids born of PPR vaccinated dams were tested first at 7 days of age, then at every 30 days interval until 150 days of age. All the serum samples were subjected to a competitive enzyme linked immuno sorbent assay (C-ELISA) for the detection of antibody level. Fifty percent inhibition (PI 50%) was considered as the protective antibody level. The protective antibody level in vaccinated goats was found to persist for 4 years.