Aim: The aim of present study was to explain a model of the role of occupational self-efficacy in the effect of internal marketing on human resources development climate among the employees of Pasargad Insurance Company`s branches in Tehran province.

Method: The present study was an applied research in terms of its purpose and descriptive-survey in terms of its method. Among 197 people from the statistical population of this research, 130 people were selected as a sample using Cochran's formula and the available method. Finally, 137 questionnaires were collected. To measure the variables, three standard questionnaires were used, Mary et al.'s internal marketing (2013), Pat et al.'s occupational self-efficacy (1999), and Rao and Abraham's (1986) human resources development climate. The validity was calculated through its content and structure, its reliability using Cronbach's alpha 0.967. In order to analyze the SPSS version 26 and Smart PLS version 3 software were used.

Results: The research showed that there is a significant relationship between internal marketing and human resource development climate, and the occupational self-efficacy of employees has been able to play an effective role as a mediator in the relationship between internal marketing and human resource development climate.

Conclusion: It indicates that internal marketing is strong driver for the human resources development climate, and employees with high self-efficacy have a more positive view of the human resources development climate, because occupational self-efficacy links internal marketing indicators to human resources development climate.