Per Brandtzæg (9 June 1936 – 11 September 2016) was a Norwegian dentist.
He was a professor of medicine at the University of Oslo.
In November 2006 he was proclaimed Commander of the Order of St.
Olav in recognition of his work.
He was a member of the Norwegian Academy of Science and Letters.He was also known to the general public as a proponent to retry the case of Fredrik Fasting Torgersen.