The Sacred Principle of Equality between Men and Women deserves a very thorough analysis both on its content and on its application by states. In order to study the different sources of the principle of equality between men and women, it should be noted that they are of two kinds: some are international in nature while others are national. It is well known that international law on parity provides a framework for promoting and protecting women's human rights. Moreover, the obligation to protect women's rights has been taken into account by several multilateral treaties. But it was with the creation of the United Nations, whose charter proclaimed the promotion and encouragement of respect for fundamental rights and freedoms by all, regardless of race, language and religion. It is one of the main goals of the organization that was laid by the foundations of a comprehensive international legal system of the protection of women's rights that exists today and to which women as human beings are fully entitled. Women also have the right to the protection enshrined in legal instruments under international, criminal and humanitarian law and international labour law. In the absence of the political will of the states that have ratified it, no concrete changes can be seen to improve the situation of women for their participation in companies.