To convey a sheet printed matter having a bending stiffness at a stable position state through a printer unit of a non-operating state of a printer without contamination by attaching a sheet guide member to an impression cylinder for guiding the matter fed on the cylinder.

A movable sheet guide member 29 is retracted from an impression cylinder 7 in a first drive mode, and extended at a position 29.1 relatively farther from the cylinder 7 between a movable cylinder 16 and a blower 15. The member 29 at an open suction side of the blower 15 directed toward the member 29 formed as a plate-like member of a substantially complete surface and at the position 29.1 separate from the cylinder 7 has a wedge-like suction space 32 opened at its front surface. Further, the member 29 is extended over an overall length of the cylinder 16 as seen axially of the cylinder 16, and formed in a cover obstructing the cylinder 16 from an operation of the blower 15.