Occupational exposures cause inhalation of the harmful materials in air which results in the onset of various problems in man. The present study investigates the pulmonary obstructive and restrictive disorders in 133 labors at a manufacturing company in Sari, a northern city of (Iran) in 2008. Subjects under study were exposed to pulmonary hazardous materials but in three different occupational histories with 10 years intervals. The Spirometry was done in certain time intervals, and the obtained data were recorded. Meanwhile the variables related to the onset of the aforementioned disorders were recorded. Result of this study indicated 5.26% prevalence rate complications in the subjects, and approximately 80% of the cases had pulmonary restriction and the rest had pulmonary obstruction. The ratio differed in the smokers and non smoker subjects and increased with increase in the years of experience of the worker, while the spirometry indices reduced. Considering the frequency of 5.26% pulmonary disorders with predominance of restrictive disorders as compared to the obstructive disorder which are pointed out by many researchers, it can be claimed that using proper way of primary prevention, that is, personal protection and rely on the labor supporting laws at the manufacturing companies, it is possible to prevent the occupational diseases, although considering the secondary cause of pulmonary disorders is also important.