In the period of July and August 2009 at the Veterinary Institute, Faculty of Veterinary Medicine Skopje clinical and laboratory investigations of two peacocks (Pavus Cristatus) male and female old 2, 5 years were performed. Peacocks had history of disease in the previous 3-4 months with clinical signs consisting of white diarrhea, emaciation, apathy, with normal appetite. Peacocks were treated several times with antibiotics without any success. With parasitological examination of the feces with qualitative method of flotation with saturated solution of ZnSO4 (SpG 1.4.), mass infestation with eggs of Capillaria spp was established. On the basis of laboratory results therapy with levamisole (Neositol 10% - FM Pharm) of the peacocks and thorough disinfection of the holding were recommended. On the basis of laboratory investigations, especially parasitological investigations it can be conclude that this is the first case of isolation of Capillaria spp in peacocks in Republic of Macedonia. Repeated single shot therapy with levamisole has proven effective with no side effects.