The purpose of this final work to describe and portray the process of adoption of laws in the Croatian Parliament. What is actually the law? The law is the regulatory legal act of the state, which established legal order brings a representative and legislative body of the Croatian Parliament. The law, after the Constitution, the highest and most important legal act. Why do we need laws? The laws we need that we change the social relations in all spheres of life. They set the rules binding on all citizens. Before the law all citizens are equal. The procedure for adoption of laws starts with the delivery of the proposed bill of the Parliament speaker, which then sends the accepted bill of Chairpersons of all working bodies, MPs and the President of the Government, when the Government is not the initiator. Right to make has a representative, the clubs, the deputies and working bodies of the Parliament and the Government. In justifying the necessity of passing the law, the applicant may refer to petitions and proposals that, in accordance with the Croatian Constitution, have the right to submit the citizens of the Croatian government and other public bodies, and their contents indicate the need for the adoption or amendment of a particular law.