Introduction: Fish lifting workers require an ergonomic attitude at work. If the work posture is not ergonomic, it can cause disorders of the musculoskeletal system. The purpose of this study was to determine the posture of workers in fish-lifting workers at Belawan Port based on the RULA method. The RULA method is used to estimate the risk of skeletal muscle disorders. Method: This type of research is observational with descriptive method. Data collection was done by direct observation to the field and interviews. Results: Based on the results of data classification using a method, namely RULA which can be concluded that, the posture that has the greatest risk level is the work posture in the process of selecting anchovies with a body position with a squat posture with a footstool that accommodates the body while working, with the final result of the assessment of 8. Conclusion: The solution that can be done to become the next improvement for workers during the anchovy screening process is by stretching during each work for a minimum of 3 hours.