Regional integration creates a common economic, social, and political space, which is based on interstate dialogue. A common integration space forms the territory of security, since the security sphere is not only to solve specific tasks, but also to create permanent instruments for preventing various risks. The Post-Soviet space remains a complex territory, the states of which have gone through a period of political destabilization, faced various threats, and come to the idea that only collective security mechanisms in the framework of constant cooperation are capable of preventing risks. Therefore, the Eurasian Economic Union (EAEU) is not only an economic project, it is a project that forms a common security space for all participants, and not only for its member states. In this regard, this chapter is structured around two key problems: established conceptual approaches in the field of security in relation to integration processes and tools of the EAEU for the formation of a common and indivisible security space for all its participants.