Friedrich Zimmermann (18 July 1925 – 16 September 2012) was a German politician and a member of the Christian Social Union (CSU).

As part of the CSU's hard-fought struggle against the Bayernpartei for political supremacy in Bavaria, Zimmermann was convicted in 1960 of perjury in connection with the Bavarian casino affair, but was finally acquitted in 1961 after a medical report that said: During the time of the oath, he had a reduced mental performance due to hypoglycaemia.

The affair earned him the nickname "Old Schwurhand" (an allusion to a Karl May character, Old Surehand, with "Schwur" meaning oath), which haunted him throughout his life.

Because of the affair, he was – in reference to Ludwig Anzengruber's play of the same name – also called "The perjury-farmer", but that was banned by a court.

[5] As part of a cabinet reshuffle, he was appointed minister of transport on 21 April 1989, replacing Jürgen Warnke in the post.