Pigment dispersion for ink jet ink, ink jet ink, and printed matter

A pigment dispersion for ink jet ink, comprising a binder (A), a pigment (B), and an aqueous medium (C),

• wherein the binder (A) is a binder containing a urethane resin (A1) that is a reaction product of polyol (a1), containing polyol (a1-1) having an acid group selected from the group consist of a carboxyl group and a sulfonate group, and polyester polyol (a1-2) other than the polyol (a1-1), with polyisocyanate (a2) containing polyisocyanate (a2-1) having an aromatic ring structure;
• the acid groups possessed by the urethane resin (Al) are partially or entirely neutralized;
• the glass transition temperature of the urethane resin (A1) is 70° C. or less,
• the urethane resin (A1) having a mass-average molecular weight within a range of 35,000 to 100,000;
• and
• wherein the reaction of the polyol (a1) with the polyisocyanate (a2) is performed so that the equivalent ratio of isocyanate groups of the polyisocyanate (a2) to hydroxyl groups of the polyol (a1) is within a range of 0.8 to 2.5.