Background: Postural deviations are frequent in university students and may cause pain and functional impairment. Few studies have examined the association between body posture and intrinsic and extrinsic factors. Objective: To assess the prevalence of postural changes in university students, and to determine whether factors such as age, gender, BMI, and physical activity might explain these deviations, this study helping in preventing aggravation of postural deviations and providing the young adolescent students with exercises and help tips for correcting these problems. Design: Cross sectional study. Subjects and Methods: The posture of 48 students in Hail University was assessed by DIER formetric 4D. Their mean age was 20.35 ± 2.678, height was 185.56 ± 7.128 and weight was 54.19 ± 7.085. Results: results revealed positive correlation between height and weight, height and self-image, weight and surface rotation, self-image and pelvic tilting, kyphotic angle and lordotic angle, pelvic tilt and trunk imbalance, lateral deviation and trunk imbalance. Conclusion: high prevalence of abnormalities among students, so it is recommended that all instructors place more emphasis on training and using corrective actions in course one of general physical education. Furthermore, teaching the correct sleeping, sitting and carrying ways will stop high expenses and devoting long times for clinical remedies.