African horse sickness is a vector-transmitted viral disease that affects equidae. The authors report cases of disease that occurred in Namibia between 2006 and 2008. These were recorded by staff of the Istituto Zooprofilattico Sperimentale dell'Abruzzo e del Molise 'G. Caporale' and the Central Veterinary Laboratory in Windhoek. All cases described were confirmed by laboratory testing. This study received the support of Namibian state and private veterinarians and horse breeders.