Most of the students take the backpack out of the safety standardization. They complain about back pain on wearing backpack. The student’s lack of knowledge and adherence in the proper backpack application is causing subsequent and continuous wrong application. This study aimed to evaluate the relationship of knowledge and actions about the safety of backpack application towards complaints of pain in school children. The design used was descriptive correlative with a cross-sectional approach. The population was students of 5th and 6th grade in primary school. The total sample was 36 respondents, recruited by purposive sampling. The independent variables were the knowledge and action of safety backpack application. The dependent variable was back pain. Data were collected by using a questionnaire and observation form and analyzed by using the Spearman Rho test with a level of significance of α ≤ 0.05. The result showed that there was no significance correlation between the knowledge with the action of safety backpack application (p = 0.726), and no significance correlation between the action of safety backpack application with back pain (p = 0.657). This research can be concluded that the knowledge about backpack safety usage has no correlation with actions about safety backpack application. Actions about safety backpack application had no correlation with back pain. Nursing service institution is expected to provide health promotion about safety backpack application to reduce the incidence of back pain among the students.

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