Paper barrier material

A paper barrier material characterized by meeting the conditions in (1) to (3) below:

• (1) a water vapor permeability at 40±0.5° C. in temperature and 90±2% in relative humidity is 3 g/m2·day or below;
• (2) an oxygen permeability at 23° C. in temperature and 0% in relative humidity is 3 ml/m2·day·atm or below;
• and
• (3) an oxygen permeability at 23° C. in temperature and 85% in relative humidity is 3 ml/m2·day·atm or below,
• wherein the paper barrier material is constituted by a paper barrier base paper that comprises, as a sole base material, a paper base material having thereon a water vapor barrier layer as well as a gas barrier layer containing a water-soluble polymer, and a protective layer is further provided on at least one side of the paper barrier base paper, wherein the paper barrier base paper has the water vapor barrier layer and the gas barrier layer, in this order, on the paper base material.