Jean-Théodore Monbeig-Andrieu, MEP (22 October 1875 in Salies-de-Béarn – 12 June 1914 in Litang) was a French Catholic missionary and botanist who collected plants for the Paris Natural History Museum from northern Yunnan where he was posted.

Monbeig was ordained for the Paris Foreign Missions Society and sent to the Tibetan part of Yunnan in 1899.

He assisted Father Jules Dubernard [fr] who was murdered in 1905 in Tse-kou with other colleagues.

He devoted his free time to collecting plants from the mountains.

In November 1913, the Apostolic Vicar of Tibet in Tatsienlu, Pierre-Philippe Giraudeau [fr], called Monbeig to Batang, Sichuan to revive the Christian community there.