Benno Erdmann (30 May 1851, Guhrau – 7 January 1921, Berlin) was a German neo-Kantian philosopher, logician, psychologist and scholar of Immanuel Kant.

Erdmann received his Ph.D. in 1873 from the University of Berlin with a dissertation on Kant.

The title of his thesis was Die Stellung des Dinges an sich in Kants Aesthetik und Analytik.

Hermann von Helmholtz proposed Erdmann's publication Die Axiome der Geometrie (1877) as the basis for a habilitation.

[2] He was the father of journalist Lothar Erdmann.