PURPOSE: To prevent the generating of a stain, scratch, etc., by giving a source marking such as a bar code to the important position of a package, providing a contact protective means at the part and making other object hard to contact.

CONSTITUTION: A source marking 2 such as a bar code is printed at the important position of a package 1, and by a contact protective means composed of a transparent resin film 3 which is stuck so as to cover the provided part of the source marking 2, other object is not brought into contact with the part directly. In a craft package, the source marking 2 is directly printed, and in case of the corrugated cardboard package, the label, to which the source marking 2 is printed, is stuck to the surface of the package 1. The film 3 is durable to the stain and the scratch, therefore, the inconvenience as experienced before that the source marking 2 is made dirty and scratched and an optical reading can be avoided.