Abstract: Under the conditions of developing information society both social system and essential (generic) personality features undergo transformation. These transformations have both positive and negative consequences. Today there are a lot of researches which authors try to find and analyze what causes such transformations. Having analyzed researches devoted to this issue, the authors of the present article discover that researchers ignore one of the main reasons of negative personality transformations which is transformation of socialization process. In the course of their research the authors have studied and analyzed results of both Russian and foreign researches on the matter. The research methodology includes the theory of activity and theory of socialization developed by Nizhi Novgorod Club 'Universum' headed by L. Zelenov as well as the concept of information socialization offered by E. Gryaznova. The results of the research demonstrate that the main reason for personality transformation in the process of information socialization is the replacement of an actual actor of socialization with an informative quasi-actor. At the personalization stage generic features of personality are subject to transformation as a result of changes in structural elements of three main subsystems of culture (informative, praxiological and axiological subsystems). To adjust to rapidly changing conditions created by information culture, human has to change at the level of human essence. The language, activity and communication methods are transformed, too.