In this study, the effective factors to increase the efficiency of virtual social networks in the media organizations are studied.Case study is Public Relations Society of Iranian Managers. The research is an applied one and its method is correlational-survey. The data were collected by a researcher-made questionnaire. The research sample consists of 200 members of Public Relations Society of Iranian Mangers. Simple non-probability sampling was used to select the population.Research hypotheses are as follows:1. From the viewpoints of the Public Relations Society of Iranian Managers, there is a significant relationship between the components of cultural development and the increased efficiency of virtual social networks in the media organizations.2. From the viewpoints of the Public Relations Society of Iranian Managers, there is a significant relationship between the components of social capital and the increased efficiency of virtual social networks in the media organizations.3. From the viewpoints of the Public Relations Society of Iranian Managers, there is a significant relationship between the components of the information society and the increased effectiveness of virtual social networks in the media organizations.Collected data from the questionnaires were analyzed in two ways:First, data were analyzed using descriptive statistical methods. In this section, they have been described by tables, figures, diagrams and etc. And in the other, by correlation method through appropriate statistical tests, the relation between the components of cultural development, social capital and information society and the increased efficiency of virtual social networks in media organizations has been studied. Based on the analysis, all of the hypotheses are confirmed in this study.The components of information society include electronic learning, business, citizen and government.The components of social capital include participation, reciprocity, mutual trust, support, empowerment, cooperation, commitment, responsibility and leadership.The components of cultural development include these five elements: cultural creativity, dialogue, virtual (cyber) culture, cultural freedom and behavioral pattern (meme). In the effective factors model of increasing the effectiveness of virtual social networks in media organizations, total of 17 components were identified. Finally, recommendations are presented for improving the effectiveness of virtual social networks in the media organizations.