The authors with the help of cephalometric RTG analysis study the changes of facial skeleton in children with orofacial clefts and the treatment results. Cephalometric analysis was performed on distance X-rays in patients with orofacial clefts from the whole Slovak republic in the number of 178, with age of 7.8 and 9 years. According to the type of the fissure the patients were divided in four groups. The control group consisted of 46 healthy children with the same age. The method of Schwartz was used (1958). The analysis revealed some characteristic changes in patients with orofacial clefts, which document that not only local disorder of lips, alveolar process and palate develops in these patients, but the fissure defect affects also more distant parts of visceral skeleton and important growth centers. (Tab. 5, Fig. 1, Ref. 14.)