A photocurable ink composition comprising: a resin which contains an amino group having one or more hydrogen atoms on a carbon atom at an α-position and having an amine value of 4.2 mmol/g to 12 mmol/g; and a radically polymerizable monomer, wherein the radically polymerizable monomer contains at least one of a monofunctional radically polymerizable monomer or a bifunctional radically polymerizable monomer, a total content of the monofunctional radically polymerizable monomer and the bifunctional radically polymerizable monomer is 50% by mass or greater with respect to a total mass of the photocurable ink composition, and a content of a radically polymerizable monomer containing an acid group in the radically polymerizable monomers is 1.5 mmol or less per 100 g of the photocurable ink composition, wherein the following ink composition is excluded from the scope of the claim: - 29 % by mass of cyclic trimethylolpropane formal acrylate, - 23.20 % by mass of isobornyl acrylate, - 28.00 % by mass of 2-phenoxyethyl acrylate, - 2.00% by mass of 3-Methyl-1,5-pentanediol diacrylate, - 2.00% by mass of triethylene glycol divinyl ether, - 0.40 % by mass of FLORSTAB UV12 which is a nitroso-based polymerization inhibitor, tris(N-nitroso-N-phenylhydroxylamine) aluminum salt manufactured by Kromachem Ltd., - 2.00 % by mass of photopolymerization initiator 1, i.e. IRGACURE 819 which is bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide, - 1.00 % by mass of photopolymerization initiator 2, i.e. IRGACURE 184 which is 1-hydroxycyclohexylphenylketone, - 0.80% by mass of isopropylthioxanthone, - 8.60 % by mass cyan millbase including 20 parts Pigment Blue 15:3, 5 parts Solsperse 32000 dispersing agent and 75 parts 2-Phenoxyethyl acrylate, and - 3.00 % by mass of a specific resin including 80 % by mass of 10 % by mass of, 10 % by mass of and the following terminal: a resin which contains an amino group having one or more hydrogen atoms on a carbon atom at an α-position and having an amine value of 4.2 mmol/g to 12 mmol/g; and a radically polymerizable monomer, wherein the radically polymerizable monomer contains at least one of a monofunctional radically polymerizable monomer or a bifunctional radically polymerizable monomer, a total content of the monofunctional radically polymerizable monomer and the bifunctional radically polymerizable monomer is 50% by mass or greater with respect to a total mass of the photocurable ink composition, and a content of a radically polymerizable monomer containing an acid group in the radically polymerizable monomers is 1.5 mmol or less per 100 g of the photocurable ink composition, wherein the following ink composition is excluded from the scope of the claim: - 29 % by mass of cyclic trimethylolpropane formal acrylate, - 23.20 % by mass of isobornyl acrylate, - 28.00 % by mass of 2-phenoxyethyl acrylate, - 2.00% by mass of 3-Methyl-1,5-pentanediol diacrylate, - 2.00% by mass of triethylene glycol divinyl ether, - 0.40 % by mass of FLORSTAB UV12 which is a nitroso-based polymerization inhibitor, tris(N-nitroso-N-phenylhydroxylamine) aluminum salt manufactured by Kromachem Ltd., - 2.00 % by mass of photopolymerization initiator 1, i.e. IRGACURE 819 which is bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide, - 1.00 % by mass of photopolymerization initiator 2, i.e. IRGACURE 184 which is 1-hydroxycyclohexylphenylketone, - 0.80% by mass of isopropylthioxanthone, - 8.60 % by mass cyan millbase including 20 parts Pigment Blue 15:3, 5 parts Solsperse 32000 dispersing agent and 75 parts 2-Phenoxyethyl acrylate, and - 3.00 % by mass of a specific resin including 80 % by mass of 10 % by mass of, 10 % by mass of and the following terminal: - 29 % by mass of cyclic trimethylolpropane formal acrylate, - 23.20 % by mass of isobornyl acrylate, - 28.00 % by mass of 2-phenoxyethyl acrylate, - 2.00% by mass of 3-Methyl-1,5-pentanediol diacrylate, - 2.00% by mass of triethylene glycol divinyl ether, - 0.40 % by mass of FLORSTAB UV12 which is a nitroso-based polymerization inhibitor, tris(N-nitroso-N-phenylhydroxylamine) aluminum salt manufactured by Kromachem Ltd., - 2.00 % by mass of photopolymerization initiator 1, i.e. IRGACURE 819 which is bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide, - 1.00 % by mass of photopolymerization initiator 2, i.e. IRGACURE 184 which is 1-hydroxycyclohexylphenylketone, - 0.80% by mass of isopropylthioxanthone, - 8.60 % by mass cyan millbase including 20 parts Pigment Blue 15:3, 5 parts Solsperse 32000 dispersing agent and 75 parts 2-Phenoxyethyl acrylate, and - 3.00 % by mass of a specific resin including 80 % by mass of 10 % by mass of, 10 % by mass of and the following terminal: 80 % by mass of 10 % by mass of, 10 % by mass of and the following terminal: