The review analyzes systematic studies of the psychological separation phenom- enon. The high relevance of the study is outlined because it stays in addition to the vast range of works devoted to the personal identity. Major authors’ ideas, a theoretical model of separation presented for the first time, a description of the types of harmoni- ous and disharmonious separation, a new look at family dynamics are marked. Special attention is paid to new facts in a little researched area of the relationship of adult children with their parents.