Francesc Boix Campo (14 August 1920 in Barcelona – 7 July 1951 in Paris) was a Catalan veteran of the Spanish Civil War and photographer who was imprisoned in the Mauthausen concentration camp.

He was able to hide and preserve until liberation about 2,000 negatives[5] taken by the SS head of the department, Paul Ricken [de],[6][7] as well as by himself.

On January 28 and 29, 1946, at the Nuremberg trial (International Military Tribunal), Boix was called by the French prosecution to show photographs taken by the SS in Mauthausen.

[7] In April 1946 Boix was again a witness, this time in the American military trial that took place in Dachau against 61 accused from the Mauthausen camp.

[11][12] El fotógrafo de Mauthausen is a Spanish film directed by Mar Targarona released on 26 October 2018.