PURPOSE: To prevent that the data displayed on the bottom surface of a recessed part is rubbed even when the surface of a corrugated cardboard box is rubbed by the contact with other matter by forming the recessed part to a part of the corrugated cardboard box and displaying data such as a bar code on the bottom surface of the recessed part.

CONSTITUTION: A recessed part 2 is formed to the side surface of a corrugated cardboard box 1 and a bar code (data) 3 is provided to the bottom surface 2a of the recessed part 2 by printing. The corrugated cardboard 10 constituting the corrugated cardboard box is formed from a corrugated core 11 and the surface and rear liners 12,13 holding the core 11 therebetween but the recessed part 2 is formed by deforming the surface liner 12 and the core 11 under pressure or formed by preliminarily forming a pair of the slits parallel to the data display part of the corrugated cardboard and pressing the area between the slits. By this constitution, even when the surface of the corrugated cardboard box is rubbed by vibration, the data 3 on the bottom surface 2a of the recessed part is not rubbed.