The scientific publication is devoted to highlighting the peculiarities of the legal nature of the constitution. The authors consider the structure and content of the constitution of the state in the context of its functions. The specificity of the content of the newest constitutions in the history of world constitutionalism is considered. The correlation between the constitution and the state policy is established. Modem approaches to understanding the nature of the constitution are considered. The legal nature of the Constitution of Ukraine is determined.