Introduction: Ergonomic factors can increase the prevalence of musculoskeletal disorders. The aim of this study was to determine the effects of the ergonomic variables on the prevalence of musculoskeletal disorders between the urban and out of urban drivers in Ilam province. Materials and Methods: The population studied in this research including 251 peoples of the urban and out of urban drivers in Ilam province in [2007][2008]. The different variables such as driving state, seat position, driver cab condition, the diameter of the steering wheel, steering angle to the horizon and etc were examined. Data analysis was conducted by statistical methods (SPSS-16 and x2 test) and the p-value of 0.05 was used as significant. Results:The results showed that there was a significant relationship between the slope of the pedals, the height of steering wheel, seat position, availability of the driver cab, steering angle, the use of driver back protector with the prevalence of musculoskeletal disorders and the spinal pain due to the driving (p<0.05). Conclusions: Recognition of many factors in design of equipment of driver cab to create the safe environment for drivers is necessary. Therefore, the condition around of driver in car should be identified and so design that driver feeling comfort and relax on duty.