The article focuses on identifying the role of social representations on social knowledge. The scope of social representations is to transform new unfamiliar things into well-known facts, helping in such a was people to „build” the reality. Actually, people think and behave according to the social representations they are clinging. Each society, each group has its own representations of the reality. To understand where each social representation came from it is important to find out what are the unknown thing which gave birth to it.