This paper attempts to answer two questions: 1- is there a relationship between individuals’ social capital in the real and virtual worlds? ; And, 2- if yes, what is the nature of such relationship? Is it of reflexive type or of that of complementary? An attention should be made, on the one hand, on the fact that in recent years a good bulk of research has turned its focus on the issue of social capital and sociologists have investigated various dimensions of such matter. And on the other hand, this attention should be made on the fact that virtual world, as a computer-based one, has facilitated communication, and along the same lines is thus blooming drastically. The discovery of the relationship between these two worlds as well as the phenomena connected with them increasingly draws attention of academic circles to do research on it. On a par with this, some researchers believe that individuals’ social capital in real and virtual worlds are mutually related and such a relationship is at times complementary and at others is in odds with the other, i.e., a reflexive relationship. Reflexive in the sense that those individuals who enjoy a high social capital in their ordinary everyday lives regarding the volume of communicative network, the degree of social trust, support, etc., also enjoy the same and high level of social capital in their virtual network and world. This is as if their virtual world is reflexive of their real world. On the contrary, some believe that this relationship is a complementary one in the sense that those individuals who, for whatever reasons, enjoy a low social capital in their everyday lives, attempt to acquire a high social capital in their virtual world. This means the virtual world would compensate for and/or is complementary of their weaknesses and shortcomings in their real world. To answer the preceding questions, we have used the theories of sociologists such as those of Barry Wellman, David Nood, Jele Attema, and Howard Rheingold to create a theoretical framework that would better address our problematic. Also, we used a social survey using a sample of 384 individuals from Esfahan city selected through two stages sampling i.e. random and stratified sampling. The sample was selected from individuals of 15 to 24 years of age using net-cafes in Isfahan in 2011. Some of our research findings are as follows: • Social capital of the participants in both real and virtual worlds was low (below the average); • The extent of their social capital in real world and that of the virtual one was proportionally related; • There is a direct and significant relationship between their social capital in the real world and that of the virtual one though this relationship is not robust; • The direct and positive relationship between the individuals’ social capital in the real world and that of the virtual world is indicative of a type of reflexive relationship and therefore the findings support the theories of Rheingold and Attema.