According to explicit verses of Quran (Isra', 31; The Cow, 178-179) main penalty for murder is retaliation. But based on Islamic jurisprudence, if the father murders his child, he won’t be retaliated accordance to demands of reasons. In this paper, main question is whether reasons of non-murder is assigned to retaliation or divested death penalty from him absolutely (even in the face of other crimes of killing children by parents like attack and war) ? For example, if the murder of child is in the form of war and corrupting on earth, will the father be sentenced? This issue is reflected less in jurisprudential views and the jurists have written about it less.Legislator has been silence in this case too. However, cannot be denied the generality of this phenomenon in society. Considering the above instances and article 167 (The judge is bound to endeavor to judge each case on the basis of the codified law. In case of the absence of any such law, he has to deliver his judgment on the basis of authoritative Islamic sources and authenticfatawa. He, on the pretext of the silence of or deficiency of law in the matter, or its brevity or contradictory nature, cannot refrain from admitting and examining cases and delivering his judgment) thoroughly investigate the subject seems necessary. The chosen view of authors in this paper is existence of legitimacy of this penalty relying on reasons and argues and claims. This article reflects the authors’ efforts and explaining the chosen theory.