The subject of this study is the leadership of Kosem Sultan in the context of her life and applications. She had an important place in Ottoman history for 30 years. Our study aims to determine how Kosem Sultan formed a leadership characteristic and leadership model based on her applications that made her mark in a certain period of the Ottoman Empire. In this context, the answers were sought for questions about what kind of strategies she had developed to remain in power, what kind of ways she had followed up to rule the state, how she established relationships with the high state officials of the palace and how she had achieved to remain in power for such a long time. The leadership theory, the leadership types of Weber and the cultural capital opinions of Bourdieu were taken into consideration for this purpose. Although the life of Kosem Sultan came to a dramatic end, her characteristics such as living in saray, having a strong personality, intelligence, skills and abilities, being cheeseparing and rational in consideration of events and able to eliminate the dangers and risks ensured her to take the lead in Ottoman rule for a long time.