This study aimed to know the legal reasoning in cassation level to search for legal value and justice in criminal case. The methodology used was normative methodology with statue approach. This study examined judge’s decision in cassation level, notably in criminal case. The results showed that legal reasoning of judge in cassation level focused in seven primary points, including comprehensive method and analysis, new interpretive verdict, new legal construction, coherent syllogistic, no jumping conclusion, forced conclusion, and suitability with value and justice. While its pattern was divided into three thoughts such as partial judge reasoning, ethical judge reasoning and pragmatic judge reasoning. Therefore, it can be concluded that legal reasoning plays an important role in guiding judges to judge cases, so that justice, certainty, and benefits to society can be achieved.