Musculoskeletal Disorders (MSDs) that lead to important health problems and the depletion of social resources are the most common drawbacks affecting the working population. MSDs that are at the top of the list showing the expenditures for all disorders, and affecting the job efficiency, life quality and physical and social functions of a worker in a negative way, is generally due to the poor working postures. There are several methods to identify the poor working postures that cause Musculoskeletal Disorders (MSDs) and financial burdens to the economies along with serious health problems for workers. OWAS (Ovako Working Posture Analysing System), one of these methods, depends on the observational analysis of work movements especially in physically demanding works. In this study, the working postures in tire raw materials production process are analyzed with OWAS method and some suggestions are made about the possible improvements to eliminate the poor working postures.