Introduction:In every organization ,man power is the most important element. of excellence and progress and is the essential factor in the realization of its goals. Since job satisfaction plays a significant role in achieving organizational goals as well as individual and social health, thus the influencing factors must be examined by the public sector so they cold correct the weaknesses and reinforce the strengths through careful recognition of opportunities and threats . the present study was conducted toward the above-mentioned objective. 

Methods:The study is a descriptive - analytical research conducted on 324 randomly selected personnel of Birjand University of Medical Sciences. The data collection tool was job description index. The data were analyzed by Analysis of variance (ANOV A) and k2 by means ofSPSS software.

Findings:The findings indicate that there is a significant relationship between gender and job satisfaction regarding promotion system and salary (P < ',' 0). There was also a significant relationship between the personnel with different educational backgrounds in five job types. Personnel vlith degrees higher than bachelor were more satisfied with their jobs and salaries. Theses People, however, showed less satisfaction with their supervisors, colleagues, and promotion system. A significant relationship was also observed between service rank and job satisfaction. The Most amount of dissatisfaction concerning payment was related to clinical and "health" care Personnel. 

Conclusion: In order to increase job satisfaction, modifications must be done in areas like the present evaluative methods, payment systems, personnel's attitudes toward their jobs, and manager - personnel relationships. Taking personnel's needs into account, and planning precise long-term schedules can also be effective in this regard.