A work relationship means a social relationship between an employer and a worker based on their agreement on the basis of which a worker undertakes to perform a particular work personally in accordance with the instructions and orders of the employer who in turn is required to provide the necessary means for work while at the same time respecting the norms provided for by law, collective agreement and the rules of work regulating their mutual relationship. In this relationship the worker and the employer are asymmetrically placed. The employer is the one who carries the main responsibilities and carries the risks of doing business while at the same time decides on the tasks to be executed, including on the basis of economic and organizational authority, including the way of achieving work efficiency. On the other hand, a worker can only offer his/her personal ability and professional qualifications. Therefore, economic and organizational dependence has become the main characteristic of the relationship between employer and worker. In the theory of labor law, whether it is about extensively theoreticists, or those who for the restrictive application of the term labor relations, the term is mostly formalistic. However, the right to work can not be identified with the concept of a labor contract, since it is only one of the forms of employment. The content of the concept of employment can be determined only from its essential elements, and only partly from the labor contract, as one of the instruments based on the employment relationship.