Background: The aim of this study was to investigate the role of The organizational citizenship behavior on the establishment of a comprehensive quality management in hospitals of Medical Sciences, Sari city.

Materials and Methods: This study is applied and descriptive method survey. The statistical population is composed the number of 1180 people included all employees in Mazandaran University of Medical Sciences hospitals (city of Sari) that according to Krejcie & Morgan table (1970) Stratified random sampling method 291 persons samples were selected as based on gender. For data collection from questionnaires Podsakoff et al (1990) with 5 factors (conscientiousness, sportsmanship, civic virtue, respect and courtesy, altruism) consists of 24 questions and the questionnaire as well as total quality management (TQM) with 8 questions were used.The validity ostensible and content was confirmed by specialists and its reliability using Cronbach's alpha coefficient was 0.85 for organizational citizenship behavior and total quality management questionnaire was 0.89. To analyze the data, univariate and multivariate regression analysis were used.         

Results: Univariate regression analysis showed that, The organizational citizenship behavior positive and significant role in the establishment of a comprehensive quality management and total quality management score about 36% of the variance is explained by The organizational citizenship behavior. The results of multivariate regression tests showed that, of loyalty, chivalry and altruism positive and significant role in the establishment of a comprehensive quality management, and the chivalry with beta coefficient β=0.301 plays the most important role in the establishment of a comprehensive quality management.

Conclusion: The organizational citizenship behavior on the establishment of a comprehensive quality management in the hospitals of the city of Sari positive and significant role and chivalry is the most important role.  We suggest that managers and directors of medical sciences pay more attention to this aspect.