This article considers the meaning of the two amendments of the Polish People ’ s Republic constitution dated of 1989. The fi rst one was adopted in April while the second one in December the same year. The Author says that the amendment of the 29th December 1989 should be recognized as a revision of the constitution. At that time the political system of the state was changed. Poland was no longer a socialist state and became a democratic one, ruled by the law and implementing the principles of social justice. “ Round table agreements ” and parliamentary elections held in June 1989 were in the grounds of the democratic changes. Poland experienced a state system revolution. Some evolutionary methods were applied then. Together with a new democratic system, a civil society was born in Poland.