M. H. Landauer (1808 – February 3, 1841) was a writer on Jewish mysticism, born at Kappel, near Buchau, Württemberg in Germany. He was a son of the cantor Elias Landauer, and at the age of 18 entered the yeshiva and lyceum in Karlsruhe; later, he studied at the universities of Munich and Tübingen. In spite of ill health, he returned to Munich in 1838 to copy from Hebrew manuscripts in the Royal Library extracts for use in his investigations. In 1839, he passed the examination for the rabbinate, and in the following year was appointed rabbi of Braunsbach, Württemberg. Only three months later, illness obliged him to resign his position and to return to Kappel, where he died.
Of Landauer's works, the following may be mentioned:
Landauer's posthumous works and excerpts, dealing with his investigations of the history and literature of the Kabala, of the Zohar, and of Jewish literature, as well as his report on his studies of Hebrew manuscripts, were published in Orient, Lit. 1845–46.