The rights of workers to participate together with employers in decision-making on their economic and social rights and interests, is certainly one of the most advanced achievements of labor law codification in democratic states. It represents a kind of democratization of individual and collective rights of workers and is an important part of a comprehensive system of labor relations. At the time of the initial accumulation of capital, regulations more protected the interests of employers, and it was only at the time of the industrial revolution that legislation began to protect the interests of workers as well. Fighting for more human working conditions, the workers organized themselves into trade unions and fought for the right to participate in the drafting and adoption of more favorable labor regulations for them through various trade union actions. With its conventions, the International Labor Organization raised the standards of workers' rights, which experienced a more complete and concrete democratization after the Second World War through the cooperation of labor, capital and the state. More advanced legislation then also regulates the right of workers to co-decide with employers on the economic and social interests of the workers themselves. The processes of economic, political and institutional cooperation and connection of countries after the Second World War resulted in the creation of the European Union in Europe, whose acquis directed the legislation of the member states towards liberalization and democratization of workers' right to participate in decision-making with employers. In accordance with the acquis of the European Union, the Republic of Croatia has regulated in its Labor Act the matter of workers' participation in decision-making through the workers' council, a group of workers and workers' representatives in the employer's body.