INTRODUCTION: Rapid progression of industrialization and low attention to safety roles have caused increasing occupational accidents. This study was aimed to evaluate occupational accidents in Iranian Aluminum Company in 1999.MATERIALS & METHODS: This was a cross-sectional study. The studied population include all workers (3945 persons) of Iranian Aluminum Company in Arak during year 1999. Data was collected by studing worker`s files, observation and interview. The related factors including age, years of service, occupation, marriage, injuried organ, place of accident, type of accident, hour and period of accident were evaluated. RESULTS: The accident rate in our study was 16.48 in 100 workers. Mean age and mean of years of service were 33.05 and 6.27 years, respectively. The most common injuried organs were feet (31.7%) and hands (23.7%). The most common time of accident was 10 A.M (10.9%). The most common injuries were traumatic injuries (30.6%), fractures (22.9%) and burns (19.4%).CONCLUSION: Regarding the research`s results, it is recommended to perform safety educational programs, correct high risk conditions and use personal safety equipments for decreasing frequency and severity of the accidents.