Purpose: Mentoring creates a competitive advantage for the organization in compared to the competing organizations. As a result, the aim of this study was identifying the dimensions of mentoring for school principals of Tehran province. Methodology: This study in terms of purpose was applied and in terms of implementation method was qualitative from type of synthesis research and content analysis. The research population was articles related to mentoring in domestic and foreign valid databases in the 2000 to 2023 years and academic experts and officials with experience in education of Tehran province in the 2021-2022 academic year, which number of 18 articles and 17 experts and officials of education according to the principle of theoretical saturation were selected as a sample with the purposive sampling method. Data were collected by taking notes from articles and semi-structured interviews with academic experts and education officials and were analyzed by using thematic analysis method in MAXQDA-V12 analysis software. Findings: The findings showed that based on the review of articles and interviews with experts and officials, mentoring for school principals of Tehran province had 81 sub-themes in 16 main themes of knowledge, attitude, skill, participation-oriented, focus, organization, support, educational leadership, educational communication, development of inherent skills, development of communication skills, development of technical skills, development of environmental skills, innovative performance, competitive performance and educational performance. Finally, a themes network of mentoring for school principals of Tehran province was drawn. Conclusion: According to the findings of this study, can be taken an effective step in order to implement the school principals mentoring of Tehran province through the realization of the identified sub-themes and main themes.
