A politburo or political bureau is the highest political organ of the central committee in communist parties. It is present in most former and existing communist states.

The central committee is designated as the highest organ of a communist party between congresses. Per the principles of democratic centralism and unified power, the central committee is empowered to deal with any issue that falls under the party's purview. While formally retaining this role in socialist states, commonly referred to as communist states by outside observers, in practice, it delegates this authority to numerous smaller internal organs due to the infrequency of its meetings. The term of a central committee of a ruling communist party is usually five years. The party congress elects individuals to the central committee and holds it accountable. At the first central committee session held immediately after a congress, it elects the party leader, an office usually titled general secretary of the central committee, a political organ, commonly known as the politburo, and a executive organ, customarily named the secretariat.