Werner Haase (2 August 1900 – 30 November 1950) was a professor of medicine and SS member during the Nazi era.

[1] Upon the recommendation of Karl Brandt, Haase began serving as Hitler's deputy personal physician.

In a telegram Hitler sent to Haase on his birthday in 1943, he stated: "Accept my heartfelt congratulations on your birthday", as reproduced in the book Hitler's Death: Russia's Last Great Secret from the Files of the KGB, based on documents in Soviet archives.

[2] In late April 1945, during the last days of the fighting in the Battle of Berlin, Haase, with Ernst-Günther Schenck, worked to save the lives of the many wounded German soldiers and civilians in an emergency casualty station located in the large cellar of the Reich Chancellery.

[8] SS physician Ludwig Stumpfegger distributed cyanide capsules to the various military adjutants, secretaries, and staff in the bunker.

Doubting the efficacy of the cyanide capsules, Hitler ordered Haase summoned to the Führerbunker to test one on his dog Blondi on 29 April.

[12] Haase, Helmut Kunz and two nurses, Erna Flegel and Liselotte Chervinska were taken prisoner there by Soviet Red Army troops on 2 May.