Abstract
In this article, a theoretical approach is considered that reveals the essence of the concept of «professional competence», the definitions of this term according to the scientific literature are studied and described. The features of the concept of «professional competence» are revealed. In addition, the article deals with the problem of the duality of the essence of the concept of «professional competence». Two approaches to the essence of the concept of «professional competence» are highlighted: a behavioral approach as an individual characteristic manifested in the behavior of a specialist and a functional approach as requirements for an employee from the side of tasks. The analysis of the essence of the concept of «professional competence» in behavioral and functional approaches is carried out. Based on the analysis of the approaches, the duality of the nature of professional competence is substantiated. The author’s definition of the concept of «professional competence» is given.