By studying of present situation of universities in Iran, through research regarding students' lives, this article seeks to consider the features of students' professional identity. The professional identity is a social one, made, in relation with other individuals, through practical learning and instruction and professional experiments. For the students, the formally start of a social
involvement, coincides with the start of their studies, and the formation of their professional identities will be intensified and reinforced through practical instructions concerning their fields. The method used in this study is qualitative research in the way of grounded theory method. To create the sample, the theoretical method is used and continued to reach saturation stage. The findings, hence, are collected applying the prevalence interview technique for 19 students
and group interview for 15 students of University ofMazandaran. The research findings suggest that, the professional identities of the students have two features of scientific and personal identities. The students' scientific identity is formed by the students' tendencies and attitudes, and also their scientific actions and efforts. The personal identity is a perception that student builds up of himself as a scientific actor present at university environment. The development of a professional identity, in addition, is associated with the position of the individual within the community. Hence, the gender, socio-economic status, supports by family and friends, individual's social environment and networks influence on the formation of his professional identity.