The Sociolinguistic Journal of Korea, 14(1). The aim of this study is to uncover the characteristics of expression of identity in e-mail identification (ID). At the present, people live in two societies. One is the real society and the other is virtual society. To live in each society, people must have their own unique identity. A person's identity in real society is ascribed by his/her social status. However, in virtual society, one can create an identity in his/her individual way. Name and e-mail ID are very effective ways to distinguish one from others in each society. Therefore, in this study, the ways of creating an e-mail ID are researched and nine aspects of making an identity by using language is examined. As a result of this research, it is concluded that an e-mail ID has distinctive characteristics that a family name does not, which stem from spontaneity and creativity.