The aim of the present research is studying and understanding of the factors related to the amount of social security feeling of users in virtual social networks. The research method was survey from analytical type. The Statistical Society of this research was all students of Tabriz Islamic Azad University in the academic year 93-94; the sample size was determined by using the Cochrane formula as 378 and for increasing confidence coefficient was raised to 400 people. Sample size was selected by simple random sampling from multistage cluster type to respond to the questionnaire. Data collecting tool was a researcher-made questionnaire and they were analyzed by SPSS software. The theoretical framework of the study based on the theories of “trust”, such as Bernard Barber, Nicholas loman, David Johnson, Cellass Ofeh", theories of "the sense of security," such as the school of Copenhagen, dorakim, Parsons, Marx, Mazlu, Merton, Bari Buzan","Theory of religious affiliations," David Dersler","the theory of participation by James Colman, John Alester, Gary Bekero. Findings of this study show that the level of social security feeling in virtual networks for majority of respondents is moderate (65 %). Also the most important results of this study show that: There is significant relationship between age, level of education, amount of presence of people in virtual social networks, religious affiliations of respondents, interpersonal trust between respondents, the amount of the use of content of shared materials and participation of respondents in the activities of a social network and security feeling that they have in a virtual social network. Also, there is no relationship between the marital state and gender of respondents and their level of adherence to cultural values and social security which they feel in virtual social networks.