NOVELTY - A gas barrier film comprises 1st polymeric resin layer which is formed by laminating 1st polymeric resin obtained by mixing organometallic compound with organic-inorganic hybrid resin in ratio of 5:5-1:9, and 2nd polymeric resin layer which is formed by laminating 2nd polymeric resin obtained by crosslinking reaction of coating composition containing water-soluble polymer, metal alkoxide and coupling agent.    USE - A gas barrier film for laminated body used for medical infusion solution packaging material or food packaging material, electronic material packaging material and sheet for solar cells (all claimed).    ADVANTAGE - Gas barrier film has excellent hot-water tolerance, oxygen permeability and water-vapor permeability.    DETAILED DESCRIPTION - A gas barrier film comprises 1st polymeric resin layer which is formed by laminating 1st polymeric resin obtained by mixing organometallic compound with organic-inorganic hybrid resin in ratio of 5:5-1:9, and 2nd polymeric resin layer which is formed by laminating 2nd polymeric resin obtained by crosslinking reaction of coating composition containing water-soluble polymer, metal alkoxide and coupling agent. Water-soluble polymer is mixture of acetoacetyl modified polyvinyl alcohol (PVA) which is partially substituted hydroxyl group by acetoacetyl group, and ethylene modified PVA which partially substituted hydroxyl group by ethylene group. INDEPENDENT CLAIMS are included for:    (1) gas barrier film laminated body comprising polyamide and sealant film which are laminated on laminated surface of gas barrier film which has hot-water tolerance through adhesive agent in which gas-barrier property of laminated body is less than or equal to 0.05 g/m2.day and oxygen permeability is less than or equal to 0.05 cc/m2.day.atm, gas-barrier property after hydrothermal processing for 120 minutes by hot water is less than or equal to 0.1 g/m2.day and oxygen permeability is less than or equal to 0.1 cc/m2.day.atm and peeling strength of each layer is greater than or equal to 3 N/15 mm when T-shaped peeling at peeling rate of 300 mm/minute;    (2) medical infusion solution packaging material or food packaging material comprising gas barrier film laminated body which has gas barrier film; and    (3) electronic material packaging material and sheet for solar cells comprising gas barrier film laminated body which has gas barrier film and hot-water tolerance.