Present research sets its goal on investigation of effects of CLOOB social network on member’s social identity. To do so,It’s used the mitture of sociological and relational theories.In order to data collection, it’s used measurement and online questionnaire technique.This study’s statistical community are member’s of CLOOB social network Regarding time limitation and high amount of population in statistical community, volume sample was selected through 385 people Cochran formula with accidental way of sampling.To count indicator validity it’s used formal validity and to count calcvlating indicators, it’s used Cronbach Alpha.Data analysis is done by using SPSS application and data is analysis desecriptive statistics and inference.In descriptive part.it’s used analysis of on variable a descriptine parameters and in inference pait,it’s used 2variabales to test assumptions and multi-variabae Regression to make clear the amount of effect of each independent variable on user’s social identity.The most important findings of this research believe CLOOB channel is one of the reasons that causes the simplicity of acceptancc in increasing & relativity.This change caves the raise of halo holiness of some traditional identity values and rethinking on it.As this research has shown. CLOOB’s member’s are too affected by its atmosphere and they have found their social identity