This research is aimed at assessing the relationship between religious attitude and job performance of the employees of Iranian Tobacco Company. This is a descriptive-correlational research. The statistical population includes all 2350 employees of the Iranian Tobacco Company, from whom 251 persons are selected as the sample through convenience sampling method on the basis of Morgan's table. Serajzadeh’s Religious Attitude Questionnaire (1998) and Paterson’s Job Performance Questionnaire (1992) are employed for data collection. The results indicated that there was a positive and significant relationship between the dimensions of faithfulness, empiricism and rituality and job performance. However, there was no significant relationship between the dimensions of outcome and job performance. The results also signified a positive and significant relationship between religious attitude and job performance. The results of regression coefficient pointed out that only the empirical dimension, of the four dimensions of religious attitude variables, could predict job performance. Accordingly, it is suggested that religious attitudes be considered in order to increase job performance of the employees.