To provide a packaging sheet feeder of a packaging machine which can avoid the deflection, curl or clogging of a packaging sheet transferred by a suction and transfer belt even when affected by the wind pressure caused by the turret rotation.

This packaging sheet feeder has a suction and transfer belt 4 for drawing out a packaging sheet wound in a roll, sucking the packaging sheet 1 cut to the predetermined length by four separate suction belts 11-14 of the suction and transfer belt 4 moving in a substantially perpendicular direction and transfer it to the packaging position, spaces between the suction belts 11-14 of the suction and transfer belt 4 are covered by a shielding plate 24, and the rolling-up, etc., of the packaging sheet 1 sucked and transferred by the suction and transfer belt 4 by the wind pressure generated by the rotation of the turret of the packaging machine is avoided.