Absenteeism due to low back pain increases the financial burden on society. Therefore, the assessment of LBP-related absenteeism and its associated factors can be helpful. In this cross-sectional study, 771 workers with history of low back pain during last year have been evaluated. Information was collected from examinations carried out by physicians. About 29.2% of the participants had a history of absenteeism, and regression analysis showed that number of children, medication use, and doing MRI were associated with absenteeism. A high frequency of absenteeism was observed (about 30% of workers had LBP), which could be due to the lack of proper management or correct treatment. The other interesting results were the lack of use of medications and primary treatments for the improvement, along with the need to perform an MRI. In terms of the variable of the number of children, higher daily costs and the need for more income can be attributed to their lower absenteeism.