To provide a flexible printing press, which is constituted so as to print the single surface or both surfaces of a sheet and equipped with the transfer cylinder 3 arranged between two impression cylinders 2 and 4 of two printers in the running direction of the sheet and the sheet support 8 arranged corresponding to the transfer cylinder 3, and constituted so as to turn over the sheet by improving a system capable of placing the sheet on the sheet support 8 before the sheet is transferred to the second impression cylinder 2.

A turn-over drum 9 is arranged between the sheet support 8 and the second impression cylinder 4 in a sheet running direction and the sheet 5 can be received from the sheet support 8 by the turn-over drum 9 to be fed to the second impression cylinder 4.