The paper is an attempt to argue for the methodological distinctiveness of legal sciences. The methodological distinctiveness (specificity) of legal sciences has been presented in three dimensions: 1) the subject; 2) methods and 3) purpose of scientific research. The analysis can be used both for the argument against the lack of a methodological identity of the legal sciences and positively for the comprehensive research and the integrative model of the legal sciences. In view of the complexity of the subject and the aims of legal science should be used various research methods. In further research, it would be advisable to establish their possible systems in a specific research problem.