This study aimed to dentify the factors affecting the quality improvement model of school management in primary schools in Zanjan province. This research with a socialist interpretive approach seeks to examine the factors, criteria and indicators of improving school management quality from the viewpoints of experts, the school management experts, and operating educational leaders? Sample size and sampling method was Purposeful and semi-structured interviews were conducted with 25 elementary school principals. The measuring tools were designed in the form of a 107-question questionnaire based on the identified components. Its face and content validity were confirmed by experts and finally the reliability coefficient was (0. 95). The data from these sources have been converted into textual data and have been categorized by the underlying method. After open coding, axial and selective coding were performed. Accordingly, 8 factors, 26 criteria, and 107 indicators were obtained. The findings of the study showed that all of 8 factors (planning, training and learning, educational and extracurricular activities, physical education and health, participation, human relations, supervision and assessment, administrative and financial affairs management), criteria, and indicators should be considered in order to provide an appropriate model of school management quality.