To provide a gas barrier laminate which can be laminated by laminating a resin layer and a paper substrate layer, i.e., by a dry process without coating with a gas barrier layer, reduces the environmental burden, and achieves a high gas barrier even under a high-humidity environment.SOLUTION: A gas barrier laminate is formed by laminating a resin layer and a paper substrate layer, where the basis weight of the paper substrate is 20 g/m2 or more and 40 g/m2 or less, the total light transmittance of the paper substrate is 70% or more, and the ratio of the basis weight of the resin layer to the basis weight of the paper substrate layer (resin layer/paper substrate layer) is 1.00 or less.SELECTED DRAWING: None