Viktor Hermann Brack (9 November 1904 – 2 June 1948) was a German Nazi war criminal, an organiser of the euthanasia programme Action T4, where the Nazi state systematically murdered over 70,000 disabled German and Austrian people. Following this, Brack was one of the men responsible for the gassing of Jews in the extermination camps, and he conferred with Odilo Globočnik about the practical implementation of the Final Solution. Brack was sentenced to death in 1947 and executed by hanging in 1948.