The Ulaanbaatar Trade and Economic Representative Office in Taipei (, ), () is the representative office of Mongolia in Taiwan, functioning as a de facto embassy in the absence of diplomatic relations.
Its counterpart is the Taipei Trade and Economic Representative Office in Ulaanbaatar The Taiwan External Trade Development Council previously established a Taiwan Trade Center in June 2002.
The ROC recognized Mongolia's independence on 14 August 1945 and revoked on 24 February 1953 after the Soviet Union supported the Communists. It re-recognized Mongolia's independence on 3 October 2002 and the representative office was established in December 2003.