In May 2013 the party of the Polish Solidarity with Zbigniew Ziobro (further called „SP”) announced the project of changes in the current Constitution of the Republic of Poland from 2 April 1997 (further called „Constitution RP”). This project was presented in the form of consolidated text of the constitution which obtained the name of „New Constitution of the Republic of Poland” (further called „Project SP”). The Project SP proposes amendments or repeals of 83 articles of the Constitution RP (it makes a bit more than a third of its all articles) as well as addition of nine articles, not always completely new as for their solutions. The Project SP proposes introducing changes in the Constitution of RP covering in particular: system of legal sources, list of general rules of the system of state, forms of direct exercising power by the nation, especially introducing the presidential system of government, which mean far-reaching reforms of constitutional system of authorities. The article focuses the attention on their analysis and assesses them from the viewpoint of their democratisation, rules of legal state and contributing to rising effectiveness of activities of authorities while comparing them with regulations introduced by the Constitution of 1997. The estimate of proposals of constitutional system of RP covered by Project SP is not to be unidirectional – only approving or only critical. Some of these proposals deserve a positive mark, others arouse estimative dilemmas due to their loose ends or controversial character; finally there are those which cannot result in other than negative marks.