The article is devoted to the historical evolution and modern development trends of the Constitution of Poland. It provides the general characteristics of formation and development of the Republic of Poland. It is emphasized that Poland is the earliest explorer of the European constitutionalism. Since 1791 in the constitutional history of Poland were approved the nine constitutional documents. In addition, consideration is given to such historical constitutions as the Constitution of May 3, 1791, the Grodno Constitution of November 23, 1793, the Lower Constitution of February 20, 1919, the March Constitution of 1921, the Constitution of 1935, the Constitution of the Peoples’ Republic of Poland of 1952, the Constitution of 1976, the present Constitution of 1997. The article reveals the main features of the present Constitution and characterizes contemporary constitutional system of Poland.