Not with standing unity among muslim jurisprudents for legality of temporary marriage in islam, unfortunately some of opponent with their personal mistake understanding abuot temporary marriage, blames "Imamiya" for permissibility ruling of this kind of legal marriage. This paper with illustration of shared rules of temporary marriage and permanent marriage by explanation of its lawful from Quran &Ahlolbayt (s.) traditions, is answering to the misgivings with standing on historical backgrund, including age of prophet(s.) and final period of "Umar" caliphate. The author substantiate the matter via principle of permission &non-abrogation of law and finally remarks wisdom of temporary marriage especially in necessity cases.
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