Adolphe-Léopold Danhauser (26 February 1835 – 9 June 1896) was a French musician, educator, music theorist and composer.Adolphe Danhauser was born in Paris and studied at the Paris Conservatoire with François Bazin, Fromental Halévy and Napoléon Henri Reber. He won the Second Prix de Rome in 1863 and began to develop an interest in early music education while still at the Conservatoire. In 1872 he published Theory of Music which is still printed and considered authoritative. In 1875, Danhauser was appointed chief inspector of instruction in singing in the schools of Paris. Later he took the position of professor of solfeggio at the Paris Conservatoire. He conducted a tour through the Netherlands, Belgium and Switzerland to survey systems of music pedagogy. Danhauser died in Paris.