Background: The concept of health and the right to health is one of the most important concepts in the world of thought and practice, wherein any type of defining and demarcating the concept, undoubtedly affects the health of individuals and their access to health services.

Methods: This research is based on descriptive and analytical method and its data were collected from printed sources such as books, articles and internet resources in English and Persian.

Results: Theories that underpin the concept of health have often targeted the issue individualisticly or collectivistically, which are not very defensible today, and the dominant approach is the integrated one accentuating individual and social aspects of the concept of health. The right to health, in which the health is the core concept, has been the subject of theoretical challenges that often address the minimal or maximum role of the state and government in facing with the right to health.

Conclusion: The concept of health, like any other concept, can be defined differently in various paradigms of thinking. In "biomedical paradigm", health is not having a physical disorder. The "Biopsychosocial model" considers disease a widespread phenomenon throughout the human organism. Finally, under the "rights-based approach", the right to health is a right/claim to have access to health-related facilities, welfare, and services that are also recognized in international documents. Achieving the "highest attainable level of health" requires specific conditions and requisites. Without cultural, social, economic, and political infrastructure on the one hand, and the financial and human resources available to the state on the other, such level of health cannot be obtained.