Objective: This study analyzes occupational risk and health problems, and job satisfaction of workers in the metal material, parts, and equipment industries according to working hours.<BR>Background: In the global trade environment, the materials, parts and equipment industries are the basis of national industrial competitiveness. There are differences in the working environment, health problems, and job satisfaction according to working hours.<BR>Method: 1,578 workers were extracted from the 5th Korean Working Condition Survey data. Among them, 803 (10.9%) worked less than or equal to 40 hours and 775 (49.1%) worked more than 40 hours per week.<BR>Results: Overall, they had a lot of exposure to risk factors. In addition, the exposure to risk factors of the group working more than 40 hours per week was more frequent than the group working less than 40 hours, except for the exposure to the sitting position. Except for hearing loss, the problem and pain complaint rate were higher in the group working more than 40 hours per week. Longer working hours has a negative effect on work-life balance, but the degree of participation in decision-making about work, social support by supervisors, and the organizational atmosphere were all positively evaluated among respondents who worked more than 40 hours per week. Overtime workers feel low organizational satisfaction, and in particular, have a statistically significant negative perception of compensation.<BR>Conclusion: It was found that the longer the working hours were, the more problems with health, musculoskeletal system, and health condition were. Efforts and support to create a safe workplace through improvement of working hours are required.<BR>Application: The results can be used as basic data on improving working condition especially for the working hours and reducing work-related risk factors and health-related problems of metal workers.