Montgomery Rufus Karl Siegfried Straube (6 January 1873 – 27 April 1950) was a German church musician, organist, and choral conductor, famous above all for championing the abundant organ music of Max Reger.

[3] He gave up his career as a performer relatively early in order to pursue teaching and publishing, particularly the music of Max Reger, though he still kept his position at the Thomaskirche.

His contribution to the history of organ performance was chiefly through his advocacy of the music of Reger and his many students, including Heinz Wunderlich.

However, Straube compiled these editions "with the approval of the composer," regarding his many "subjective" editorial markings (most of which completely change the architectural concept of Reger's music).

He made this statement in the preface (1938) to his final Reger edition of Ein feste Burg ist unser Gott, op.

His fraught exit from the cantorate in 1939 bore the scars of his Nazi affiliations and issued in a final decade of struggle and disillusionment as German society collapsed.