In this case, it was intended to define the right displacement of the abomasum complicated with abomasitis in 45 days old unweaned Brown Swiss male calf with clinical and ultrasonographic examination and further to report the operative treatment results. Metallic ping and splashing sounds were heard on the right side in the percussion of the 10-13th intercostal space. Right abomasal displacement was confirmed by ultrasonography. After the diagnosis of the illness, its treatment was done operatively through the right abdominal wall. During the operation, approximately 6 L content was emptied from the abomasum. Edema, ulceration and inflammation were seen on the abomasum wall. As a result, it was determined that abomasitis could develop together with the displacement of the abomasum to the right, which is rarely seen in calves. Successful results can be obtained by bringing the abomasum to its normal position during the treatment made through the right abdominal wall.