An egg printing system comprises a printer and an endless egg conveyor that is adapted to move the eggs past the printer. The conveyor including an endless element running around a set of rotational wheels and a drive unit defining a conveying direction of the conveyor. The egg conveyor includes a lane of egg retaining pockets coupled to the endless element, said lane of retaining pockets in use moving in the conveying direction. Each retaining pocket has a central axis and an upper receiving opening to receive an egg with a longitudinal axis of the egg generally aligned with said central axis of the pocket. The pocket has a side opening at a side thereof facing in the conveying direction and/or in the opposite direction, leaving a side surface area exposed of the egg that is received in the pocket. The retaining pockets remain in an upright position in every position in the lane. The printer is positioned at one of the head sections of the conveyor with a printing head facing the corresponding lane being directed to said side opening in the pocket to allow printing on said side surface area of the egg.
