Benjamin Ball (April 20, 1833 – February 23, 1893) was an English-born French psychiatrist, Professor of Mental Medicine in the Paris Faculty.He was born at Naples, his father being an Englishman and his mother a native of Switzerland.
He became a naturalised Frenchman in 1849,
and spent the whole of his professional life in Paris.
He studied medicine under Jacques-Joseph Moreau de Tours and Jean-Martin Charcot and was an assistant of Charles Lasègue at the Salpêtrière Hospital.
During his internat he was Laureate of the Academy of Medicine (Prix Portal, in collaboration with Charcot).
In 1885, he published a trail-blazing treatrise On morphinomania (La morphinomanie), in which he evidenced the toxic effects of cocaine which were not absolutely acknowledged at the time.