A modular rolling mill comprises a plurality of separate rolling units (10) arranged along a mill pass line (P). Each rolling unit (10) includes at least two pairs of work rolls (14,16) defining oval and round roll passes and carried on roll shafts that are staggered 90° with respect to each other. The rolling units (10) contain intermediate drive trains configured to connect the roll shafts to parallel input shafts (20) projecting to a first side of the pass line (P) from the respective rolling units (10). A single driven line shaft (36) is parallel to and on the first side of the pass line (P). Output shafts (42) are mechanically coupled to the line shaft (36) by bevel gear sets (44). The output shafts (42) project laterally from the line shaft (36) towards the pass line (P) and are connected by separable couplings (46) to the input shafts (20) of the rolling units (10).
