A packaging box is formed by a bottom surface member disposed at the side of a bottom surface of goods to be packaged, and a top surface member disposed at the side of a top surface of the goods to be packaged. The bottom surface member includes a base panel, side panels formed extending integrally from the base panel and further shaped to correspond to side surfaces of the goods to be packaged. An attachment panel extends integrally from the end of each side panel. The top surface member and base panel typically include corrugations. The corrugations in each item are preferably oriented generally transverse to one another, thereby increasing the strength of the structure without requiring additional material.