Background and Aim: Focus on organizational health could ensure the future success of any organization. Considering the fast changing conditions of hospitals and the necessity of effectiveness, employees are required who can show voluntary behavior towards the organization and customers. Therefore, this study mainly aims to survey the relationship between organizational health and organizational citizenship behavior in selected hospitals of Tehran University of Medical Sciences(TUMS).

Materials and Methods: This cross-sectional, descriptive-analytic study was conducted in 2010. The population of the study comprised the entire staff of TUMS selected hospitals. In total, 312 employees were selected. The researchers gathered their data using questionnaires of organizational health and organizational citizenship behavior. For data analysis, both descriptive statistics(percentage, mean, standard deviation and variance) and inferential statistics(Pearson correlation and regression) were applied. The data were analyzed using SPSS18 software.

Results: The correlation between the organizational health and five dimensions of organizational citizenship behavior(Conscientiousness, Altruism, Helping Behavior, Civil Virtue, Sportsmanship, and Courtesy) was significant(p = 0/0001).

Conclusion: Given this significant correlation between organizational health and organizational citizenship behavior, organizations can make improvements in employees' behavior. This can be achieved by creating harmony among members and through continuous improvement and growth.