In the world of scientific communications, social networks can be considered as an effective tool for creating knowledge and sharing ideas. The objective of social networks is to help the growth and promotion of science through providing the possibility of connections between individuals and forming the social capital The objective of this analytical study was to investigate the extent to which LIS is capable to establish social capital. The content analysis was used to analyze 1400 messages to identify the types of messages. The findings show that although most of the messages sent to LIS (about 82%) are \"Know-What\" type of knowledge, the number of \"Know-Why\", \"Know-How” and \"Know-Who\" types have been increased during the two years of study. This is in agreement with the results of similar research. The messages sent to the list are not distributed suitably among professional subjects. Finally, the results prove that most LIS members acknowledge this list as a suitable communication tool which helps them to enhance their knowledge. Most participants in survey research have positive opinion about LIS as social capital. However, it is worth to consider that despite LIS group have most of the characteristics of social network which is capable of establishing social capital, some of its features should be taken into more consideration more seriously.

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