Sometimes, the misjudgement of imperfect human can not be avoided because capital punishment is decided by a judicial officer, human. Dreiinstanzen system has been adopted to prevent misjudgement. However the possibility of misjudgement can not be entirely excluded in the judgement by a judicial officer as the judgement of a lower court and a higher tribunal depends on the specific criminal cases. And in case of capital punishment executed by misjudgement, it leads to a cruelty result which has not ways to recover the damage. There is an opinion that dangerousness of misjudgement is lacking in persuasiveness because of insufficient demonstration for the abolition of capital punishment. However, also, there is an opinion that the abolition of capital punishment in case of misjudgement is persuasive with reality. In this case, even if other punishments are discussed separately, once capital punishment is executed, it can be irrevocable unjustice because a nation itself commits a crime. According to this, I would like to find out causes of misjudgement in the criminal justice system through the cases of advanced countries, such as United states, Japan, which are rich in studies and case analysis related to misjudgement, and introduce their efforts to prevent misjudgement in this paper.