The objective of this study is to investigate the weight of schoolbags and the factors related to schoolbag carriage on first, second, third and fourth year school students. The study was performed on 800 children aged six to eleven years at elementary school level in a government school in Zawia city - Libya. The body weight (kg), height (cm), schoolbag weight (kg), percentile of school bag weight to body weight and questionnaire included school bag type, perception of students toward school bag weight were evaluated and health effects (back pain, shoulder pain and neck pain) were recorded during the interviewing period. The data were analyzed using statistical package for social science and the significance level was considered as α=0.05. A two-strap backpack without wheel that was used by (88.6%) students in the study and the weekly mean schoolbag weight was 4.27 kg. The mean schoolbag weight as a percentage of mean body weight carried by the students was (15.53 ± 8.88)% and 91% of students carry school bags weighing more than 10% of their body weight. For pain related to carrying schoolbag; 71% of students had shoulder pain, 63% had lower back pain, and 28.4% had neck pain. The effect of bag weight and ratio of bag weight to body weight were highly significant on back, shoulder and neck.