An antifogging agent composition, comprising: a copolymer; a polyfunctional blocked isocyanate compound; and a surfactant, wherein the copolymer is formed of a monomer (A-1) represented by a following general formula or, a monomer (A-2) represented by a following general formula, and a monomer (A-3) represented by a following general formula or, (In the general formula, R 1 represents a hydrogen atom or a methyl group, R 2 represents a C 1 to C 4 straight chain or branched alkyl group, -C(CH 3) 2 CH 2 COCH 3, -C 2 H 4 N(CH 3) 2, or - C 3 H 6 N(CH 3) 2, and R 3 represents a hydrogen atom or a C 1 to C 4 straight chain or branched alkyl group) (In the general formula, R 4 represents a hydrogen atom or a methyl group) (In the general formula, R 5 represents a hydrogen atom or a methyl group and R 6 represents a C 1 to C 16 straight chain, branched, or cyclic alkyl group) (In the general formula, R 7 represents a hydrogen atom or a methyl group and R 8 represents a C 2 to C 4 straight chain or branched alkylene group or -C 2 H 4 (OCO(CH 2) 5)n-(n=1 to 5)) (In the general formula, R 9 represents a hydrogen atom or a methyl group and R 10 represents a C 1 to C 4 straight chain or branched alkylene group), a content of the monomer (A-1) is 35 to 90 parts by weight, a content of the monomer (A-2) is 5 to 60 parts by weight, and a content of the monomer (A-3) is 5 to 30 parts by weight per a total content of 100 parts by weight of the monomer (A-1), the monomer (A-2), and the monomer (A-3), an NCO/OH ratio obtained by dividing an isocyanate group content of the polyfunctional blocked isocyanate compound by a hydroxyl group content of the copolymer is within a range from 0.1 to 1.5, and the surfactant includes an anionic surfactant (C-1) and a cationic surfactant (C-2), a content of the anionic surfactant (C-1) being 1.00 to 10.0 parts by weight per 100 parts by weight of the copolymer, a content of the cationic surfactant (C-2) being 0.01 to 3.00 parts by weight per 100 parts by weight of the copolymer, wherein the anionic surfactant (C-1) is a fluorochemical surfactant. a copolymer; a polyfunctional blocked isocyanate compound; and a surfactant, wherein the copolymer is formed of a monomer (A-1) represented by a following general formula or, a monomer (A-2) represented by a following general formula, and a monomer (A-3) represented by a following general formula or, (In the general formula, R 1 represents a hydrogen atom or a methyl group, R 2 represents a C 1 to C 4 straight chain or branched alkyl group, -C(CH 3) 2 CH 2 COCH 3, -C 2 H 4 N(CH 3) 2, or - C 3 H 6 N(CH 3) 2, and R 3 represents a hydrogen atom or a C 1 to C 4 straight chain or branched alkyl group) (In the general formula, R 4 represents a hydrogen atom or a methyl group) (In the general formula, R 5 represents a hydrogen atom or a methyl group and R 6 represents a C 1 to C 16 straight chain, branched, or cyclic alkyl group) (In the general formula, R 7 represents a hydrogen atom or a methyl group and R 8 represents a C 2 to C 4 straight chain or branched alkylene group or -C 2 H 4 (OCO(CH 2) 5)n-(n=1 to 5)) (In the general formula, R 9 represents a hydrogen atom or a methyl group and R 10 represents a C 1 to C 4 straight chain or branched alkylene group), a content of the monomer (A-1) is 35 to 90 parts by weight, a content of the monomer (A-2) is 5 to 60 parts by weight, and a content of the monomer (A-3) is 5 to 30 parts by weight per a total content of 100 parts by weight of the monomer (A-1), the monomer (A-2), and the monomer (A-3), an NCO/OH ratio obtained by dividing an isocyanate group content of the polyfunctional blocked isocyanate compound by a hydroxyl group content of the copolymer is within a range from 0.1 to 1.5, and the surfactant includes an anionic surfactant (C-1) and a cationic surfactant (C-2), a content of the anionic surfactant (C-1) being 1.00 to 10.0 parts by weight per 100 parts by weight of the copolymer, a content of the cationic surfactant (C-2) being 0.01 to 3.00 parts by weight per 100 parts by weight of the copolymer, wherein the anionic surfactant (C-1) is a fluorochemical surfactant.