Even though psychological capital has been identified as an important issue in the workplace, little research has focused on it through organizational support. Drawing on leadership theory and conservation of resources theory, this article examines the mediating role of organizational support in the relationship between leadership behavior and psychological capital in insurance companies in Jordan. The questionnaires were distributed randomly. Out of 350 questionnaires, 335 questionnaires were effective for analysis, after analyzing the data using the statistical program SmartPLS version 3.2.6. Based on the theories, a significant impact of organizational support on the relationship between leadership behavior and psychological capital of employees was found. Thus, the study recommended maintaining the interest of senior management in the insurance companies operating in Jordan to identify and educate the managers of these companies in choosing the appropriate leadership behavior in accordance with the company’s data and the circumstances surrounding it at the right time and place.