This thesis aims to analyze about the Effort of United Nations Women on the eliminating discrimination against women in Egypt Post Egypt Revolution 2011. To analyze the problem, this thesis adopts the concept of international organization, international regime theory and the concept of gender mainstreaming. To achieve success in eliminating discrimination against women in Egypt, UN Women build a gender equality regime in Egypt through gender mainstreaming in increasing women political participation, ending violence against women and enhancing women economic empowerment. The effort of UN Women are applied in programs that cooperate with Egypt Government and other organization that include as Non-Governmental Organization (NGO) and also another International Organizations