The employee's organizational citizenship behavior, organizational justice, and transformational leadership behavior of 4000 employees of several enterprises in Mianyang are investigated through questionnaire and analysis of their relationship using the methods of the factor analysis and the correlation analysis. The organizational citizenship behavior is measured with the activeness dimension, organizational faithfulness, and helping dimension; the transformational leadership behavior is measured with the moral example, leadership charm, and aspiration incentive. The result shows that there is correlation relationship between employee's individual diversity and organizational citizenship behavior. The transformational leadership behavior has positive impact on the organizational citizenship behavior (activeness, organizational faithfulness, and helping behavior). The different dimensions of the organizational justice are related with those of the organizational citizenship behavior. And the relationships between the transformational leadership and organizational citizenship behavior will be partially mediated by the organizational justice. Finally, some limitations of the research are indicated and some suggestions on the future research are given.