Human resources are responsible for an organization´s success. Human resources are a very important factor in the organization. This paper presents the role of human resources in building the organizational structure. The People department serves as the backbone of every organization. The employees play an important role in building the organizational structure. The professional discipline and business function that oversees an organization´s human resources is called Human resource management (HRM or simply HR). This paper also discusses the development of human resources. Human resource development, in the widest sense of the word, refers to the acquisition and augmentation of knowledge, skills, capacities, and attitudes, as well as improvement of human behavior. In a narrower sense, human resource development is connected with the activities of the organization in which people work. This paper deals with the importance of humans, their capabilities, knowledge, and skills necessary for a successful business. Today it is necessary to invest in human capital. Workforce planning is the starting point for the human resource. Organizations that will really stand out in the future will be those that have discovered how to boost people's commitment to the organization and readiness for learning at all levels. Highly motivated and satisfied employees are the greatest value of any organization. Because of the very fast technology advancement, successful survival on the market can only be guaranteed by the most valuable resource, the human one, through lifelong learning.