Purpose: This study aims to secure basic data required to enhance the organizational efficiency as increasing the organizational citizenship behavior of nurses through identifying the influence of leader-member exchange and organizational commitment en organizational citizenship behaviors in nursing organization. Method: The subjects of this study were 352 nurses. Data was collected using structured questionnaires for 15 days from 10 to 24 April 2003. Result: According to the analysis on the influence of leader-member exchange, organizational commitment and general characteristics on organizational citizenship behaviors, the organizational commitment, leader-member exchange and tenure of office had significant influences, as 23.0%, 30.2% and 31.3%, respectively. Conclusion: It is required to increase the organizational commitment and to enhance leader-member exchanges for the purpose of inducing the organizational citizenship behaviors. Furthermore, it is also necessary to develop the strategies through development of medical environment and clinical carrier experiences for self-development of member based en long-term tenure of nursing organization