Fredrik Natanael Beskow (9 March 1865 – 8 October 1953) was a Swedish theologian and school headmaster.

The son of a priest, Beskow graduated from secondary school in 1883 and got a degree in theological philosophy at Uppsala University in 1884.

He married the children's book author Elsa Beskow in 1897 while she was teaching at Djursholms samskola where he served as head master.

Beskow never wholeheartedly agreed with the Swedish church's profession of faith, and was never ordained as a minister.

He was headmaster of the boarding school (folkhögskola) at Birkagården from 1916-30, as well as honorary doctorate of theology at Lund University in 1918, and president of the Swedish Association for Christian Social Life (Förbundet för kristet samhällsliv), which he established, from 1918-43.