Abstract
The article deals with the problems of the separation of powers in the context of transition from a presidential-parliamentary form of government to a parliamentary one. The problem of optimal separation of powers occurs in all forms of government. At the semi-presidential form of government is the main task is the ensuring of the distribution of authority between the president's power and the three traditional powers and strengthening of such system of checks and balances between the authorities, which are able to prevent the danger of the establishment of a regime of personal power of the president. In terms of parliamentary government main task is to ensure the stability of Parliament and prevent the dangers of parliament objectively unreasonable, populist legislation.