Active energy ray-curable ink composition, inkjet recording method, decorative sheet, decorative sheet molded product, method for producing in-mold molded product, and in-mold molded product

An active energy ray-curable ink composition comprising:

• (component A) monofunctional radically polymerizable monomers,
• (component B) a polyfunctional oligomer having a glass transition temperature of 20° C. or lower and an acrylate value of 300 g/value or more, and
• (component C) a bifunctional radically polymerizable monomer having a viscosity at 25° C. of 15 mPa·s or less,
• wherein the component A includes an N-vinyl compound and a compound represented by the following formula (I),
• the content of the N-vinyl compound with respect to the total amount of the ink composition is from 10 to 50% by mass, and
• the content of the component A with respect to the total amount of the ink composition is 70% by mass or more:
• wherein R represents a hydrogen atom or a methyl group, A1 to A4, B1 to B4, and C1 to C3 each independently represent a hydrogen atom or an alkyl group, A1 or A2, and A3 or A4 may be bonded to each other to form a ring, B1 or B2, and B3 or B4 may be bonded to each other to form a ring, any one of C1 to C3 and any one of A1 to A4 and B1 to B4 may be bonded to each other to form a ring, and X represents a single bond or a divalent linking group.