<p>The goal of the present paper is to analyze the effect of personnel's education and psychological competence on<br />quality of service. The mediation role of organizational competence in Ministry of the Interior is of<br />descriptive-correlational method. To do that, the standard questionnaire psychological competence by Spriters<br />(1995), personnel education and quality of service by Deher (2015) and organizational commitment by Alen and<br />Mier (1990) were used. The statistical population of the research includes all personnel of Ministry of the<br />Interior which are 1600 subjects. Based on Cochran's formula, 3100 subjects were selected randomly. In order to<br />analyze data the Pearson's correlation test and structural equation of data analysis were used by SPSS and AMOS<br />software. The findings of the research indicate that personnel's education has a positive effect on organizational<br />competence and quality of service (with Alpha level of 0.05). Moreover, the psychological competence is<br />positively affect the quality of service (with Alpha level of 0.05) and organizational commitment affect the<br />quality of service. Finally, it was revealed that the personnel training through organizational commitment affect<br />the quality of service. But, psychological competence does not affect the quality of service through<br />organizational commitment. Moreover, psychological competence does not affect the organizational commitment.<br />The significance levelof the model turned out to be more than the first type error (0.05). This shows that the<br />significant adaption of the estimated model with the present research model. Furthermore, the AGFI and GFI<br />indicators are more than the estimated value (0.9). These indicators show that the model has a capability in<br />estimating the ratio of each factor.</p>