The parliamentary system is one of the most represented political systems. The general characteristics of the parliamentary system of government are not easy to determine. First of all, one of the reason for that is the problem that the parliamentary system is not uniform, and in the constitutional-political practice there are numerous number of variants of parliamentarism. The purpose of the discussion is to indicate the position, role and function of the government in the system of rationalized parliamentarism by considering the constitutional legal solutions that regulate the place and competence of the government in the organization of government taking into account the government’s relations with other political institutions and organizations that directly or indirectly affect its functioning. In the system of the rationalized parliamentary political system, the role of the effective bearer of executive and political power has been assigned to the government. As a state body entrusted with the determination and implementation of general state policy, the government occupies a central place in the organization of government. The classical parliamentary system outside its “homeland” encountered numerous problems and challenges that were overcome to a certain extent by rationalization. By rationalizing classical parliamentarism, many states managed to establish a functional political system. By making the procedures and possibilities for overthrowing the government more difficult, the constitutional makers provided the primary prerequisites for the formation of a strong and efficient government that is able to implement general state policy and executive power with the support of the parliamentary majority, even in a fragmented multi-party parliamentary system. At the end of the twentieth century, in the constitutional practice of the state of the system of rationalized parliamentarism, a shift of power from the legislative to the executive power was noticeable. The weakened legislative and control function influenced the marginalization of the parliament on the one hand, and strengthening of the role and position of the government, on the other hand. The real political power of the government as the holder of executive power is influenced by a multitude of institutional and non-institutional factors. Particularly significant is the influence of disciplined political parties who, as key actors in modern political processes, have significantly contributed to the fusion of the legislature and the executive. The stability of the government, by the nature of things, consequently depends on their relations, mutual understanding and agreement. Thanks to political parties that have great political capacity, the government dominates the parliament. However, regardless of the political power of a political party and government, any politically irresponsible policy will be sanctioned in the elections by the citizens. In other words, the political power of the government in modern democratic states is not unlimited and unassailable. Citizens, that is, the electorate, will try to support the program and policy of the government that meets the general national interests, that is, to sanction any policy that is bad.