Basically determination of imprisonment between 3-10 years for murderer provided that the case does not lead to retribution, must be determined based on severity of crime, murderer characteristic and record. In this study, using the theory of social structure as a theoretical support, the relationship between the time of imprisonment with the type of lethal weapon, the number of shots, the type of behavior with corpse, sexual harassment of the victim, precedent of decision, mass quarrel during murder, citizenship and addiction of the murderer, the way of access to murderer, murderer sex and marital status, consumption of alcohol, sex and citizenship of the victim and the time of consent of the victims family were examined. The method used in the present study is survey and the technique of observing and studying files has been used to collect information. The population included the murder cases which have been sued at Tehran criminal court in the period of 2001-2007, from which 60 cases were selected as a sample. Pearson’ s correlation, T-Test independent and One-way-ANOVA were used for data analysis. According to the research findings, there was no significant difference in the average of imprisonment in different groups of independent variables. While there was a significant relationship between the time of declaration of consent of the parents and the amount of imprisonment