Background: There are research related with the transport time, weight and way of carrying the backpack that generate a shoulder pain, having as average between 42 and 46%; they recommend to carry the backpack for a maximum of 20 minutes, with both handles and that it should not overcome 10% of body weight. Objective: Determine the frequency of shoulder pain in students at a school caused by excessive weight, the inadequate way of carrying backpack and the long transport time of this. Materials and Methods: A cross-sectional study was conducted with 131 students from 12 to 17 years old. For data collection, we prepared a questionnaire with questions to mark and fill in regarding shoulder pain, shape, weight and transportation time that students carry the backpack, in the case of shoulder pain, we included the Visual Analogue Scale to determine the intensity. Using a scale, the student wa...