Coccidiosis is one of the important diseases in poultry industry caused by protozoan parasites from genus Eimeria, which induce a lot of economic loses annually. The aim of the present study was to evaluate the effects of DIAVERDIN Plus sulfaquinoxaline on the performance of broiler chicks in experimental coccidiosis. Two hundred and Twenty five broiler chicks were divided randomly into three equal groups. Each group contained three replicate of 25 chicks and raised on litter in similar condition. The groups 1 and 2 were infected orally at 25 days of age with a mixture of Eimeria necatrix, E. mivati, E. acervulina and E. maxima. Group 3 was kept as non-infected control group. After appearing of clinical signs of coccidiosis and increasing of oocyst number in fecal samples, namely 5 day post infection, chickens in group were treated with sulfaquinoxaline Plus DIAVERDIN. The results revealed that drug medication showed decreasing and removing of clinical signs, and feed convertion ratio (FCR) in infected chickens.