In the modern business environment, organizations are more than ever faced with the need for continuous improvement and innovation because of high complexity, dynamism and uncertainty. It is well established in literature that organizational citizenship behavior is one of the leading causes for the improvement of organizational performance. The purpose of this paper is to explore the impact of organizational citizenship behaviors on organizational performance. It also investigates if employees’ performance can be considered as a human resource management to achieve organizational success. Our contribution is to explore rule of organizational citizenship behavior dimensions including conscientiousness, altruism, courtesy, sportsmanship and civic virtue on organizational performance. This study has used quantitative research methodology wherein the data have been collected from 285 employees in a knowledge-based organization in Iran using survey questionnaire as well as SPSS software to analyze the collected data. The results showed that organizational citizenship behaviors have significant positive influence on organizational performance. The implications of the study can be used by practitioners to maintain employees’ positive reactions to improve by considering organizational citizenship behaviors as a tool to enhance organizational performance.