Gender equality rights are fundamental human rights that are recognized in international human rights treaties, which bind states to eliminate gender discrimination formally and in practice. Islam is recognized as the official religion in the constitutional law of Islamic countries; religious scholars have the competence to interpret Islamic law, resulting in creating a series of unequal rights for women based on Islamic law, which often continues in legal structures. Nevertheless, a majority of Islamic countries have ratified the international human rights treaties but have put reservations in place based on Sharia concerning articles on gender equality rights. Therefore, this dissertation addressed that the degree to which international law has accepted gender discrimination for religious reasons.