Referring to the scientific literature the authors analyze the correlation between criminal offense and psychiatric disorders. Frequency of violent behaviour in schizophrenia together with the risk factors are reviewed. The issue of violent offense is separately discussed. Impact of deinstitutionalization on offense is also analyzed. Results regarding the genetic correlations are also reviewed. Finally the question of re-offending is discussed. In summary the importance of this issue in stigmatization and in the development of the mental health care system is highlighted.