Herman Major Backer (October 30, 1856 – May 21, 1932) was a Norwegian architect.
He is best known for having designed many luxury houses, grand public buildings, and business buildings, as well as hotels and churches.
Backer was very productive and was one of the leading architects in Norway in the decades around 1900.
His son Lars Backer was later one of Norway's leading functionalist architects.Backer was educated at Wilhelm von Hanno's drawing school, at the Norwegian National Academy of Craft and Art Industry in Christiania, and in Dresden.
When he returned to Norway from abroad, he first worked for three years as a stipendiary building inspector in Christiania before he established his own practice in the town in 1882.