A laminate film comprising a coating layer, a metal oxide layer and a protective layer, with another intervening layer or without any intervening layer, laminated in this order on at least one surface of a polyester substrate film, wherein the coating layer comprises an oxazoline group-containing resin and a polyurethane resin, wherein the content of the oxazoline group in the oxazoline group-containing resin is 5.1 to 9.0 mmol/g, wherein the acid value of the polyurethane resin is 25 to 50 mg KOH/g, wherein the polyurethane resin is obtained by reacting an isocyanate group-terminated prepolymer with a chain extender, wherein the chain extender includes 4,4'-diphenylmethanediamine, tolylenediamine, 1,3- or 1,4-xylylenediamine, or mixtures thereof, 3-aminomethyl-3,5,5-trimethylcyclohexylamine (also called: isophoronediamine), 4,4'-dicyclohexylmethanediamine, 1,3- and 1,4-bis(aminomethyl)cyclohexane, ethylenediamine, 1,6-hexamethylenediamine, hydrazine, hydrazine hydrate, or 2-((2-aminoethyl)amino)ethanol, and wherein the isocyanate group-terminated prepolymer is obtained by reacting a polyisocyanate component with a polyol component containing a diol having 2 to 6 carbon atoms, and a carboxyl group-containing polyol, wherein the metal oxide layer comprises a composite oxide composed of silicon oxide and aluminum oxide, and wherein the protective layer comprises a polyurethane resin, wherein the polyurethane resin contains a meta-xylylene group in an amount of 20 to 33% by mass and a silanol group in an amount of 700 to 1700 mg per kg of a resin constituting the polyurethane resin as a Si element amount contained in the silanol group, wherein the polyurethane resin is obtained by reacting an isocyanate group-terminated prepolymer with a chain extender containing an alkoxysilyl compound having an amino group, and wherein the isocyanate group-terminated prepolymer is obtained by reacting a polyisocyanate component with a polyol component containing a diol having 2 to 6 carbon atoms, and a carboxyl group-containing polyol. wherein the coating layer comprises an oxazoline group-containing resin and a polyurethane resin, wherein the content of the oxazoline group in the oxazoline group-containing resin is 5.1 to 9.0 mmol/g, wherein the acid value of the polyurethane resin is 25 to 50 mg KOH/g, wherein the polyurethane resin is obtained by reacting an isocyanate group-terminated prepolymer with a chain extender, wherein the chain extender includes 4,4'-diphenylmethanediamine, tolylenediamine, 1,3- or 1,4-xylylenediamine, or mixtures thereof, 3-aminomethyl-3,5,5-trimethylcyclohexylamine (also called: isophoronediamine), 4,4'-dicyclohexylmethanediamine, 1,3- and 1,4-bis(aminomethyl)cyclohexane, ethylenediamine, 1,6-hexamethylenediamine, hydrazine, hydrazine hydrate, or 2-((2-aminoethyl)amino)ethanol, and wherein the isocyanate group-terminated prepolymer is obtained by reacting a polyisocyanate component with a polyol component containing a diol having 2 to 6 carbon atoms, and a carboxyl group-containing polyol, wherein the content of the oxazoline group in the oxazoline group-containing resin is 5.1 to 9.0 mmol/g, wherein the acid value of the polyurethane resin is 25 to 50 mg KOH/g, wherein the polyurethane resin is obtained by reacting an isocyanate group-terminated prepolymer with a chain extender, wherein the chain extender includes 4,4'-diphenylmethanediamine, tolylenediamine, 1,3- or 1,4-xylylenediamine, or mixtures thereof, 3-aminomethyl-3,5,5-trimethylcyclohexylamine (also called: isophoronediamine), 4,4'-dicyclohexylmethanediamine, 1,3- and 1,4-bis(aminomethyl)cyclohexane, ethylenediamine, 1,6-hexamethylenediamine, hydrazine, hydrazine hydrate, or 2-((2-aminoethyl)amino)ethanol, and wherein the isocyanate group-terminated prepolymer is obtained by reacting a polyisocyanate component with a polyol component containing a diol having 2 to 6 carbon atoms, and a carboxyl group-containing polyol, wherein the metal oxide layer comprises a composite oxide composed of silicon oxide and aluminum oxide, and wherein the protective layer comprises a polyurethane resin, wherein the polyurethane resin contains a meta-xylylene group in an amount of 20 to 33% by mass and a silanol group in an amount of 700 to 1700 mg per kg of a resin constituting the polyurethane resin as a Si element amount contained in the silanol group, wherein the polyurethane resin is obtained by reacting an isocyanate group-terminated prepolymer with a chain extender containing an alkoxysilyl compound having an amino group, and wherein the isocyanate group-terminated prepolymer is obtained by reacting a polyisocyanate component with a polyol component containing a diol having 2 to 6 carbon atoms, and a carboxyl group-containing polyol. wherein the polyurethane resin contains a meta-xylylene group in an amount of 20 to 33% by mass and a silanol group in an amount of 700 to 1700 mg per kg of a resin constituting the polyurethane resin as a Si element amount contained in the silanol group, wherein the polyurethane resin is obtained by reacting an isocyanate group-terminated prepolymer with a chain extender containing an alkoxysilyl compound having an amino group, and wherein the isocyanate group-terminated prepolymer is obtained by reacting a polyisocyanate component with a polyol component containing a diol having 2 to 6 carbon atoms, and a carboxyl group-containing polyol.