Small ruminant lentivirus (SRLV), which causes caprine arthritis encephalitis in goats and ovine progressive pneumonia (maedi-visna disease) in sheep, is classified in genus Lentiviruses belonging to Retroviridae family. It persists in infected goats and sheep, which mostly are sub- clinical. A serological survey was conducted to determine the prevalence of small ruminant lentivirus infection in Thai goat population. Serum samples were taken from 1,925 goats distributed throughout the country, then they were tested for the presence of SRLV antibodies using commer- cial indirect enzyme-linked immunosorbent assay (ELISA) test kits. Results revealed that a total of 68 goats were found seropositive, representing the apparent prevalence and true prevalence of 3.57% and 2.60%, respectively. The seroprevalence, revealed in this study, was lower than in the previous reports. The decreasing of seroprevalence might be caused by successful control strategies from Department of Livestock Development (DLD).