The Taipei Economic and Cultural Representative Office, also known as Taipei Economic and Cultural Office, Taipei Representative Office or Taipei Mission, is an alternative diplomatic institution serving as a de facto embassy or a consulate of the Republic of China (ROC, commonly referred to as Taiwan) to exercise the foreign affairs and consular services in specific countries which have established formal diplomatic relations with the People's Republic of China (PRC, commonly referred to as China).

The Taipei Economic and Cultural Representative Office in the United States represents the interests of Taiwan in the United States in the absence of formal diplomatic relations, functioning as a de facto embassy.

the representative office of Taiwan responsible for the development of relations with Lithuania.