The role of the judiciary in the national security system is at first glance dubious and irrelevant because we always associate national security with the security services, the police and the army. However, in order to be effective, the national security system must also include the judiciary, which must be autonomous and independent in its work. Preserving the independence of the judiciary and respecting the principle of separation of powers is the most difficult task for any country. The dependence of the judiciary on other state authorities reduces its effectiveness and role in the national security system, which ultimately leads to the overall decline of national security. Regardless of the necessity of its independence, it is extremely important that the judiciary in its work cooperates with other state bodies in terms of national security. It has a preventive, repressive and controlling effect on national security and is the main state mechanism for achieving social justice as a guarantor of stability and security in society. Therefore, it is a reasonable conclusion that the security of the state contains much more than the effective deployment of the army and the operation of the security services. It also requires an important role of the judiciary.