Annotation: The article is devoted to the study of the notion of the standard of proof in relation with related concepts such as the proof and the burden of proof. The study found that there are three basic standards of proof in the procedural law of the world. Special attention is paid to analysis of it’s major features. The authors also analyze the practice of the European Court of Human Rights and national courts regarding the application of standards of proof. The conclusion is made about the need for legislative consolidation of standards of evidence in Ukraine. According to the results of the conducted studying was made the conclusion about the necessity of legislative consolidation of standards of evidence in Ukraine.