Purpose: The purpose of the current research was to investigate the impact of self-development on staff creativity with the mediating role of human capital mediation in high schools.Design/methodology/approach: The study was applicable to the quantitative approach using the descriptive–correlative method. The population comprised (55888) all human resources, including Teachers, school administrations, and other support staff working in the high school of Tehran city, among whom 381 were selected using the multi-stage cluster sampling technique. Data have been collected based on "human capital," "creativity," and "self-development" questionnaire and then analyzed using the structural equation modeling approach.Findings: The study findings revealed that self-development was effective on human capital with a path coefficient of γ=0.37, and human capital impacted creativity with a path coefficient of β=0.12. Furthermore, self-development with the mediation of human capital has positively impacted creativity (β=0.27). Finally, self-development can significantly influence human resource creativity (γ=0.23).
