Background and objectives: Today, all aspects of human life, including knowledge and technology, are rapidly evolving. Organizations for their survival and dynamism are bound to innovate and change continuously. The mental models of argumentators shape, interpret, and ultimately act. Therefore, due to the importance of mental models in the changes in the organizations, we examine the role of mental models in the process of organizational change in the General Directorate of Social Security Organization of East Azerbaijan province. Methodology: This study is applied as a method of obtaining data, descriptive and because of the attempt to explain the relationships between the variables studied, in terms of research type, is correlation. Which was selected on a sample of 180 employees of the General Directorate of the Social Security Agency of East Azerbaijan province using a simple stratified random sampling method. Information was collected through a questionnaire. Normal distribution of data was determined by Kolmogorov-Smirnov test and for data analysis and hypothesis testing, descriptive statistics and Pearson correlation coefficient were used and inferential level of linear regression analysis was used. A significant level is considered (0.05). Results: The results of the study indicate that the mental models and its constituent elements (1. mental images 2. imaginations 3. mental assumptions) with the organizational change process of the General Directorate of Social Security Organization of East Azerbaijan province have a positive and significant effect has it.