The meaning of a text or determining an expression is defined as a interpretation. The prepetrators ignorance or inadequate cognition about his/her general abstract legal obligation (major hypothesis) is unimportant in generally. Someone s consideration about the legitimacy of his/her action is mentioned mistake as to law (ignorantia legis neminem excusat). The mistake of prepetrator s on general abstract legal obligation to evaluation of act which is lawful of unlawful. The prepetrator knows his/her obligation in case of mistake of fact. However, prepetrator make a mistake to the evaluation about his/her general abstract legal obligation or interpretation of law which is including legal obligation. In this case, the prepetrator knows law and fact. However, the prepetrator is considering whether legal obligation by reason of misinterpretation of law. This kind of mistake is defined misinterpretation of law or mistake as to law. The types of misinterpretation of law will provide to the differentation of legal consequences. The misinterpretation of law (mistake as to law) can raise to mistake of fact or mistake as to law or slight mistake which is not effect on penalization. If the misinterpretation of law is regarded as a mistake of fact, mens rea will disappeared but it will turn in to unavoidable mistake as to law, prepetrator can not penalize. If the misinterpretation of law is a slihgt mistake which is not effect on penalization.