Bernt Berntsen (Chinese: 賁德新, January 1, 1863 – October 16, 1933), also known as Brother B. Berntsen, was a Norwegian-American Protestant Christian missionary to China. In 1904, Berntsen and his wife Magna were able to preach along with several other independent Norwegian missionaries in a mission station in Damingfu of Zhili Province. Influenced by the 1906 Azusa Street Revival, he later founded the Apostolic Faith Mission in China (later amalgamated with the Assemblies of God) with a group of American missionaries associated with the Pentecostal movement. His evangelism had a profound influence on the early co-workers of the True Jesus Church, namely Zhang Lingsheng and Paul Wei, and he is regarded as one of the early missionary progenitors of .