Johann Michael Bach (Arnstadt 9 August 1648 – Gehren, 17 May 1694) was a German composer of the Baroque period. He was the brother of Johann Christoph Bach, as well as father-in-law of Johann Sebastian Bach (he was the father of J.S. Bach's first wife Maria Barbara Bach). He is sometimes referred to as the "Gehrener Bach" to distinguish him from the "Wuppertaler Bach", Johann Michael Bach (1745–1820).