Daniel Paul Schreber (German: ['??e?b?]; 25 July 1842 – 14 April 1911) was a German judge who suffered from three distinct mental illnesses.
The first of these was what was then diagnosed as dementia praecox (later known as paranoid schizophrenia or schizophrenia, paranoid type).
He described his second mental illness (1893–1902), making also a brief reference to the first disorder (1884–1885) in his book Memoirs of My Nervous Illness (original German title Denkwürdigkeiten eines Nervenkranken).
The Memoirs became an influential book in the history of psychiatry and psychoanalysis thanks to its interpretation by Sigmund Freud.
There is no personal account of his third disorder (1907–1911), but some details about it can be found in the Hospital Chart (in the Appendix to Lothane's book).