Objectives: This study aims to examine the factors that influence the organizational citizenship behavior of clinical dental hygienists to use them as basic data for improving effectiveness and efficiency of dentalclinics and hospitals. Methods: A self-reported questionnaire was answered by 250 clinical dental hygienistsin Seoul, Gyeonggi, Chungcheong, Jeolla and Gyeongsang province areas who were chosen using convenient sampling method from May 1st to June 30th of 2017. The data was analyzed using IBM SPSS/WIN 22.0 factor analysis on clinical dental hygienists’ organization citizenship behavior, organizational commitment, empowerment, self-leadership and job satisfaction. T-test and one-way ANOVA were performed for subjects’ general characteristics and organizational citizenship behavior, organizational commitment, empowerment, self-leadership and job satisfaction depending on their job characteristics. Themean comparison was drawn using the Scheffe test. Pearson’s correlation and multiple regression analysis were performed to examine the relation of clinical dental hygienists’ organizational citizenship behavior, organizational commitment, empowerment, self-leadership and job satisfaction Also, the significance level was set at 0.05. Results: Clinical dental hygienists’ organizational citizenship behavior was 3.84 points with organizational commitment of 3.27, empowerment of 3.41, self-leadership 3.45 and job satisfaction of 3.57. Factors that influence clinical dental hygienists’ organizational citizenship behavior appeared in the order of organizational commitment, job satisfaction, self-leadership, empowerment and job intensity, and the model’s explanation power was 45.6%. Conclusions: Clinical dental hygienists’ organizational citizenship behavior was correlated to career, organizational commitment, empowerment, self-leadership and job satisfaction, where organizational commitment had the biggest influence. Therefore, clinical dental hygienists organizational citizenship behavior needs further studies and investigtae more ways to promote factors that influence organizational citizenship behavior.