To provide a binder which can bind paper products such as newspapers and magazines, simply, surely and firmly, and offers superior workability in a recycling processing.

The binder is composed of a combination of a paper string and a hard cardboard stopper, and binds up a packed article more firmly as frictional resistance caused by the paper string and cardboard stopper prevent slipping of the string. The binder is made of paper entirely, thus can be subjected to a recycling processing to be recycled directly as a resource waste.