Obesity is significantly associated with an endless list of postural disorders. The prevalence of childhood obesity is steadly increasing so it is important to study the effect of obesity on musculoskeletal system on these children to provide meaningful support in prevention and their treatment. Aim of the study: the study aims to assess the static posture during standing position among the obese adolescent girls and compare their obtained data with non-obese adolescent girls. Cases and Methods: One hundred of non-obese adolescent girls ( group A) compared with thirty obese adolescent girls ( group B ). Their ages ranged from 12-14 years old, the mean values + SD were 13+0.7 and 12.8+1.2 years old for both groups respectively. All participated girlwere evaluated when they were on static standing position from sagittal view using photography. AutoCAD (Computer Aided Design) was used to analyze the photographic posture. The posture measurements was achieved through analysis of five angles (cervico-thoracic angle, trunk angle, lumber angle, pelvic tilt angle, sway angle ) to quantitatively assess the positioning of several body segments in the upright . Results : The results of this study revealed significant differences when comparing the mean values of the measuring angles between obese adolescent girls and non-obese adolescent girls. Conclusion: Obesity may have a greater effect on static posture. These effects on obese adolescent girlswere represented by protruded head , hyper kyphosis (dorsal spine), hyper lordosis (lumber spine ), anterior pelvic tilting , and increased posture sway .