To provide a wall paper having a function blocking volatile harmful substances such as a monomer, a residual solvent and a chemical substance isolated from an adhesive for bonding a backing material such as a wooden substrate of a wall surface, particularly an adhesive used when applying a wall paper and excellent in economical efficiency.

The wall paper blocking the volatile harmful substance has a paper substrate formed with a surface material composed of polyvinyl chloride or foamed polyvinyl chloride on a deposited thin film layer of a gas barrier material provided with a deposited thin film layer composed of at least inorganic oxide.