Abstract: A gas barrier laminate including a gas barrier layer and a sealing layer laminated on a substrate in this order, wherein the gas barrier layer is a layer formed by applying and heat-drying a coating solution containing a water-soluble polymer and at least one of a metal alkoxide represented by a general formula M(OR1)n(where M is a metal element, R1 is an alkyl group, and n is the oxidation number of the metal element) and a hydrolyzate of the metal alkoxide, a content of the water-soluble polymer is 50 wt % or more relative to a total mass of a solid content in the coating solution, a total content of the metal alkoxide and the hydrolyzate thereof is 5 to 50 wt % relative to the total mass of the solid content in the coating solution, and the sealing layer contains an aqueous heat seal varnish.

Abstract: A packaging material includes a base material made of a polymer resin composition, a gas barrier vapor deposition layer made of an inorganic compound, a gas barrier coating layer formed by using a compound comprising at least one compound selected from a metal alkoxide, a hydrolyzate of a metal alkoxide, and a polymer of a metal alkoxide, and a hydroxy group-containing polymer compound, an adhesive layer comprising an acid-modified polyolefin resin and a silane coupling agent, and formed in contact with the gas barrier coating layer, and a polyolefin sealant layer, in which the base material and the layers are laminated in the above order.