Collective bargaining is a complex communication process that seeks to meet the interests and needs of both workers and employers. The union negotiates, represents and protects workers - legally, economically and healthily. Based on the acts and laws governing each of these areas. The law provides that only trade unions can negotiate on behalf of workers. It negotiates on behalf of its members, but the rights arising from the agreement apply to members and non-members. Considering the characteristics of the workers it gathers, there are four types of trade unions: domestic, professional, branch/industrial and general union. Historically, unions were created by the advent of industry in the late 18th century. The first workers' associations to protect rights were recorded in England, USA, Germany and France. But since the 1980s, there has been a decline in union influence and power, and a steady decline in membership. At the same time, it strengthens human resource management, which is about managing people, increasing their motivation and commitment to work. Collective bargaining and association in the Republic of Croatia is determined by the Constitution, the Labor Law and the Regulations of the Labor Law, as well as the Law on Representativeness of Employers' Associations and Trade Unions and the ILO Convention. There are three trade unions in the pre-school education system. The representative union is the Union of Workers in Preschool Education of Croatia (SRPOOH). At the end of this paper, SRPOOH President Bozena Strugar, in a semi-structured interview, presented her views and reflections.