PURPOSE: To provide a gapless offset rotary press equipped with a plurality of gapless offset rotary printing devices not generating color shift and capable of withstanding practical use.

CONSTITUTION: In a gapless offset rotary press equipped with a plurality of gapless offset rotary printing devices 10, 12, 14,16, the diameters of the bracket cylinders 10a, 10'a; 12a, 12'a; 14a, 14'a; 16a, 16'a of a plurality of the gapless offset rotary printing devices are set so as to successively become large along the moving direction of the printing paper 18 passing through a plurality of the gapless offset rotary printing devices.