Cephalometry or skull measurement are used in pediatrics, forensic medicine, plastic surgery, oral surgery and diagnostic comprehension between patient and normal populations. Cephalic index is an important parameter for detecting the race and sex of an individual whose identity is unknown. The most important of cephalometric dimension are height and width of head which determine cephalic index. On the basis of cephalic index four head shapes are determined in international categories, that including dolichocephal, brachycephal, mesocephal and hyperbrachycephal. With noticing the lack of documented research about 14-18 years old girls and boys in this area, this study was planned for determining normal range of head shapes in 867girls and 960 boys in the age of 14-18 in fars-Iran. In regards of cephalic index our results showed that dominent type of head in girls was brachycephalic with 42.5% and in boys was hyperbrachycephalic with 34.3%, rare type of head shape in girls was dolicocephalic with 4.80% and in boys was 7.5%. There is significant difference between boys and girls cephalic index.