An air blowing device for a printing press includes a plate cylinder (12a), blanket cylinder (11a,11b), impression cylinder (10a), air blowing equipment (30), air suction equipment (31), and cover. The plate cylinder (12a) is rotatably supported. Ink from an inking device and dampening water from a dampening device are supplied to the outer surface of the plate cylinder. The blanket cylinder is rotatably supported in contact with the plate cylinder. The impression cylinder is rotatably supported in contact with the blanket cylinder and cooperates with the blanket cylinder to print on a printing target body under conveyance. The air blowing equipment (30) discharges air from one end side toward the other end side of the blanket cylinder. The air suction equipment (31) takes in air, discharged from the air blowing equipment (30), at the other end side of the blanket cylinder. The cover forms an air passage (32) extending from the air blowing equipment to the air suction equipment in an axial direction of the blanket cylinder.