Thomas Prinzhorn (born 5 March 1943[1] in Vienna) is an Austrian industrialist and politician of the national liberal party Alliance for the Future of Austria (BZÖ).
From 1988 to 1993, he was chairman of its Economic Policy Committee, and from 1991 to 1993, he was president of the Viennese chapter of the Federation of Austrian Industries.
In 1996, as a candidate of the Freedom Party, he was elected to the National Council for the first time, and was Member of Parliament until 2006.
After the early parliamentary elections in 2002, however, the Freedom Party fell back to third place, which meant that Prinzhorn became the Third President of the National Council.
The reason for his withdrawal from the party was massive differences of opinion with respect to Haider's political orientation, although Prinzhorn had contributed vitally in creating a restructuring plan for the Lower Austrian Freedom Party, which had run into serious financial difficulties (Rosenstingl scandal).