Introduction: Work fatigue is a condition that can lead to a decrease in vitality and work efficiency. Workers with heavy workloads are at risk of work fatigue, and working too long in a day will also increase the risk of fatigue. Therefore, it is necessary to know the influence that causes fatigue in workers, especially the workload factor and the length of time working. So that this study can provide a work evaluation to prevent fatigue.
Methods: This research method uses quantitative methods with the type of observational research with a cross-sectional design. The population in this study were informal workers in the furniture industry on Semarang Street, Surabaya City, with a sample taking using a total population of 35 people.
Results: The results of this study indicate that most workers often experience fatigue when working with high classification. Based on the results of the analysis, it is influenced by the workload and length of work, it is known from the results of the significance value <0.05. Fatigue occurs because it is influenced by the length of work in a day that exceeds 7 hours a day (work is done 6 days a week) and the heavy workload factor received by workers.
Conclusion: Can be concluded that giving workers rest time, regulating working hours in a day need to be done, reducing the burden received by workers by dividing the work evenly and so on.