The paper examines the phenomenon of “professional deformation” which comprises destructive personality changes that occur after many years of a career. This condition does not only produce an adverse effect on the personal productivity, but also gives rise to undesirable qualities in a person, alters his/her professional behaviour. Professional deformation may lead to changes in mental structure and personality traits (behaviour, ways of communication, stereotypes, perceptions, character, values, etc.). They are also one of the reasons that may prevent the professional development of a person.

Various concepts of the structure of professional deformation are considered. Thus, E.F. Zeer classifies professional deformation based on four levels of their manifestations, A.K. Markov considers professional deformation based on major trends, A. Pines, J. Aronson and A. Shirom understand professional deformation as a one-dimensional structure, D.V. Direndonk, W.B. Schaufeli, H.J Sixma, accounts professional deformation as a two-dimensional structure, while B. Pelman, E. Hartman, C. Maslach, S. Jackson and B.A. Farber identified three constructs of professional deformation, and G.H. Frith, A. Mims, E.F. Iwanicki, R.L. Schwab represent professional deformation as four-factor model, where in addition to emotional exhaustion and reduced professional achievements they considered depersonalization associated with work, and depersonalization associated with the recipients.

In conclusion, the domestic and foreign psychology are given lack of consensus on the structure of this condition.