A multi-sectional roller mill comprises at least two mill sections (2, 2') each including a plurality of 'rollers (20, 20'), wherein each mill section includes a- drive shaft (16, 16') and male and female parts of a coupling element (15) attached to respective ends of said drive shaft for rotation therewith, and wherein the said coupling element provides for rotation between said male and female parts of drive shafts of adjacent mill sections.