The nature of Permanent marriage and its legal Effects

In the legal system of Islam, establishment of family’s institution is carried out by marriage. While marrying the lawgiver considers rights and duties for each of the couples. Since the explanation of these rights and duties is directly related to the definition and nature of the marriage, study the position and the nature of the marriage contract is important. The dominant of  Imamieh jurists consider it as a contract based on barter due to the right of imprisonment and dowry and alimony. On the other hand, some consider it as naked contract. This article aims to study the consequences, rights and duties of couples by reviewing the definition of marriage. The findings show that marriage is nothing except couples' commitment to the formation of a common life. Therefore despite the existence of some rules apparently conventional, it has unconventional nature; dowry, alimony and the right to sexual productivity don’t consider as a component of marriage and its nature, but rather they are considered as a part of the mutual commitment of the couple towards each other and it results of the mutual commitment in marriage.