Johann Friedrich Wender (baptized 6 December 1655 – 13 June 1729) was a German organ builder who had his workshop in Mühlhausen.
Born in Dörna, Thuringia, Wender collaborated with Johann Sebastian Bach, who obtained his first position as an organist in Arnstadt from 1703, after he had inspected and demonstrated a new organ which Wender had built there. In 1707 Bach moved to Mühlhausen, where Wender worked. Wender died in Dörna.
Notable students of Wender include his son Christian Friedrich Wender, his son-in-law Johann Nikolaus Becker, Johann Christian Dauphin and .
Selected works Year Location Building Image Manuals Stops Notes1689–1691MühlhausenDivi BlasiiII/P29expanding, partly new1695SeligenstadtAbteiII/P311699–1703ArnstadtNew ChurchII/P29 new organ for the new church (today: Bach Church) which replaced the burned St. Bonifatius1700WeimarStadtkirche restoration1708MühlhausenDivi BlasiiIII/P38Rebuilding following Bach's suggestions. The survival of Bach's specifications has allowed the reconstruction of this lost organ.1714ErfurtII/P24Case extant1714–1717MerseburgDom- und SchlosskircheIV/P66 repair and completion of the instrument begun in 1695 by Zacharias Theißner1716–1722MerseburgSt. Maximinew organ, inspected on 11/12 May 1722 by Thomaskantor Johann Kuhnau and Georg Friedrich Kauffmann
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