Sometimes problems and Difficulties happen in a humen’s life that unbalance the Compatibility a mental equivalence, therefore tensions and sadness come to life that maybe result in a mental disorders. The issue of Psychiatric patients with law and committing crime is one of the dilemmas of fair trial. Thus the court are responsible for attracting and capturing psychiatrist expert’s ideas. In all criminal laws checking the deserve punishment or removing penalties, of an offender is related to demonstrating this issue that whether a person who has a mental disorder ,due to the understanding the nature of criminal behavior has the ability to detect the criminal result or not. In this paper, we try to survey the approach of criminal justice system of Iran with problem and subject of unti-social personality and it’s effect on the attribution of crim to offender.