National resilience building is one of the priorities of Ukraine's current national security policy. This is attributable due to the need to ensure the readiness of the state and society to respond to a wide range of threats of different origins. Also, it is conditional to the continuity of the main functions of the state. Ukraine has significant resilience potential, as it was proved by its experience in counteracting the hybrid aggression. However, systematic mechanisms of the national resilience have not been established yet. Their introduction will help to develop and strengthen Ukrainian national security system at the same time. The development and implementation of complex strategic decisions in this area requires proper scientific substantiation, first of all, for defining the concept of ensuring national resilience.