The Holy Quran has dealt with the subject of divorce and its Iddah in verses 228, 229, 231, and 232 of Al-Baqara, Al-Ahzab/29, At-Talaq/ 1, 2, 4, 6, and 7. Accordingly, Iddah of divorce is a significant subject mentioned in the Holy Quran. According to this teaching, most of the divorced women have to wait for a while and refrain from marriage with others. Using the commentary viewpoints of the Fariqain’s commentators, the present study is an attempt to investigate the reason behind this waiting and whatness of its necessity for women and the reason that some women do not need to maintain Iddah after pronouncing the divorce rituals. In addition to providing answers for the related questions, the paper illustrates that Iddah is in accordance with principles of social ethics and it is a real teaching not a credit one.