PURPOSE: To obtain a printed matter of high quality having no deviation between colors by lowering the height of a printer, shortening the length and contracting the installing space.

CONSTITUTION: The perfecting multi-color sheet printer comprises two sets of printing units 32, 33 each having a rubber cylinder 42 in which the surface of a plate cylinder 27 is brought into opposite contact with a blanket surface, and a rubber cylinder 43 which is brought into contact with the cylinder 42 and in which the surface of a plate cylinder 50 is brought into opposite contact with the blanket surface. Sheet transfer means having five transfer cylinders 54 each having a gripper is provided between the units 32 and 33.