The Constitution of the Republic of Croatia proclaims human rights and freedoms in accordance with the documents of universal character and the sources of law of the European Union and the Council of Europe. Among these rights, the Constitution establishes the rights and freedoms at work and in connection with work, the rights of workers and their associations (employers and their associations), but also the rights and obligations of the state (both when it comes to power or/and as an employer). The subject of this paper is industrial action diff erent from the strike in the content of natural rights (human rights at work), as part of the right to work and freedom to work, the right to earn “which can secure a free and dignified life for himself and his family”; the right to a limited working time; the right to vacations and leave; the right to participate in the decision-making process of the company; the right to protection of health and safety at work; the right to social security, social security and health care; the right of the coalition and the securing of trade unions “for the protection of their economic and social interests”; hence the “right to strike is guaranteed.” The issue and relations of strikes and other industrial actions are governed by law and autonomous by-laws, rules of associations, and are determined by case law, in addition to what “creates” and determines the practice in living, applicable and changing relationships, regardless of their regulation.