Daniela Marie Luise Klette (born 5 November 1958) is a German left-wing militant. She is a suspected former German terrorist associated with the third generation Red Army Faction (RAF). She went underground in the 1990s and was arrested in February 2024.

Daniela Marie Luise Klette was born on 5 November 1958 in Karlsruhe, West Germany.

Klette was active in left-wing groups from 1975 onward. These groups included the Anti-NATO movement and initiatives against the construction of Runway 18 West at Frankfurt Airport.

Klette is an alleged member of the third generation Red Army Faction active during the 1980s and 1990s. Klette is a suspect in the 1991 United States embassy sniper attack in Bonn and the 1993 explosives attack against Weiterstadt prison under construction in the state of Hesse.

In the 1990s, Klette went underground. In 1999, Klette, Burkhard Garweg, and Ernst-Volker Staub were suspected of robbing DM 1 million from an armoured vehicle in Duisburg.

Referred to by the press as "RAF pensioners", Staub, Garweg, and Klette are also associated with several robberies in the 2000s and 2010s: in Bochum-Wattenscheid (27 December 2006), Wolfsburg (28 December 2015), Cremlingen (25 June 2016) and Stuhr (6 June 2015). The German public prosecutor's office had been investigating the three since 2015 for attempted murder and various attempted and completed aggravated robberies between 1999 and 2016. In 2016, three Germans matching their description were mistakenly arrested by Dutch police after renting a farmhouse near Medemblik in the north of the Netherlands. The Bundeskriminalamt (Federal Criminal Police Office) put out a public appeal for information leading to her arrest, or that of accomplices Burkhard Garweg and Ernst-Volker Staub, offering a reward of €150,000.

Police located and arrested Klette after a tip-off from the public in November 2023.

As of February 2024 it was unclear how she managed to stay underground for 30 years.