More and more common employment of armed unmanned aircraft in armed conflicts raises questions in public space about the legality of their use. Major controversy is caused by the targeted killing of militants operating from the territory of third countries, which are often not involved in the conflict. It should be made clear that the utilization of combat unmanned aircraft is not prohibited under international law, provided that the principles of International Humanitarian Law and International Human Rights Law are observed. In other words, their use in the context of international law does not require the creation of special legal regulations and is carried out in accordance with the principles of the use of force. Also, there are not gaps in international law that could contribute to the overinterpretation of application of combat unmanned aircraft. Nevertheless, the use of armed unmanned aircraft requires consistent and rigorous compliance with international law and the creation of procedural safeguards in the context of the selection of attack targets.