Erhart spent his journeyman years in various regions including Konstanz and the Netherlands before finally settling in Ulm around 1469, where works by him are extant from around 1469–1522. He worked in the workshop of Jörg Syrlin the Elder, as did his sons Gregor Erhart and Bernhard Erhart. After 1474 he apparently had his own workshop with numerous apprentices.
Erhart's style was apparently influenced by Nikolaus Gerhaert.
- Barbara Maier-Lörcher: Meisterwerke Ulmer Kunst. Thorbecke-Verlag, Ostfildern 2004, ISBN 3-7995-8004-2.
- Brigitte Reinhardt (ed.): Michel Erhart & Jörg Syrlin d. Ä. Spätgotik in Ulm. Konrad Theiss Verlag, Stuttgart 2002, ISBN 3-8062-1718-1.
- Barbara Schäuffelen, Joachim Feist: Ulm – Porträt einer Stadtlandschaft, Konrad Theiss Verlag, Stuttgart 1987, ISBN 3-8062-0484-5, p. 171.
- Anja Schneckenburger-Broschek. "Erhart." In Grove Art Online. Oxford Art Online, (accessed December 31, 2011; subscription required).