Partial splenectomy (1/3) was performed in 16 donkeys, after resec tion of 17th rib (10 cases) and 17th and 18th rib (6 cases). Non significant changes in tota! R.B.Cs. count and haematocrite value while significant increase in total W.B.Cs. were recorded. Histopathological studies showed that the sutured spleen healed by granulation tissue that replaced gradually the necrotic foci which appeared during the first two weeks of the experiment. After four weeks, healing was complete and strong adhesions bet ween the spleen, omentum and the peritoneum were noted.