Benjamin Wolf ben Samson Heidenheim (בנימין זאב בן שמשון היידנהיים;; 1757–1832), born in Heidenheim, Germany, was a German-Jewish exegete and grammarian. At an early age Heidenheim was sent to Fürth, where he studied Talmud under Joseph Steinhardt (author of Zikron Yosef) and, from 1777, under Hirsch Janow. Besides Talmudic literature, Heidenheim devoted himself to the study of Hebrew grammar, and particularly that of the Masorah. In 1782 he left Fürth, probably on account of Janow's opposition to Mendelssohn's translation of the Pentateuch, of which Heidenheim was an admirer. He went to Frankfurt, where he made the acquaintance of the most prominent scholars, among them Wolf Breidenbach and Solomon Dubno. There began his literary activity, which lasted fifty years. In addition to his work on Hebrew grammar and critical texts of the Masoretic bible, Heidenheim produced a still-valued edition of the maḥzor based on existing medieval manuscripts.