The current study was conducted in Mazandaran, a northern province of Iran, and aimed to analyze the effect of job organization on job performance of 1000 operating staffs in 50 manufacturing companies. According to Krejcie & Morgan table [1], the minimum number of sample size was determined as 278 people. A total of 333 questionnaires were distributed among respondents and 284 usable questionnaires were returned. The research method used for this study is descriptive-correlation. Further, the analysis was carried out utilizing Structural Equation Modeling (SEM) methodology by LISREL 8.8 software. The factors analysis and the findings show that job organization has a significant positive influence on job performance. Further, a number of suggestions on managerial implementation were proposed.