A toner binder comprising a polyester resin, wherein the toner binder satisfies Formula and Formula given below and has a content of a surfactant of 100 ppm or less, G ′ x 150 ≥ 10,000 G ′ x 150 / G ′ y 150 ≥ 500 wherein G' x150 represents the storage modulus (unit: Pa) at 150°C for the tetrahydrofuran -insoluble component of the toner binder and G' y150 represents the storage modulus (unit: Pa) at 150°C of the THF-soluble component of the toner binder, wherein the toner binder satisfies Formula and Formula given below: G " x 150 / G ′ x 150 ≥ 0.1 G " y 120 / G ′ y 120 ≤ 20 wherein G" x150 represents the loss modulus (unit: Pa) at 150°C for the THF-insoluble component of the toner binder, G" y120 represents the loss modulus (unit: Pa) at 120°C of the THF-soluble component of the toner binder, G' x150 represents the storage modulus (unit: Pa) at 150°C for the THF-insoluble component of the toner binder, and G' y120 represents the storage modulus (unit: Pa) at 120°C of the THF-soluble component of the toner binder, wherein the THF-insoluble component and the THF-soluble component are obtained in accordance with the description, and the storage moduli G' x150, G' y150, G" x150, G' y120, and G" y120 are determined in accordance with the description, wherein the polyester resin comprises a non-linear polyester resin and a linear polyester resin, wherein the non-linear polyester resin is (i) a modified non-linear polyester resin produced by reacting a polyester resin having an active hydrogen on a terminal of the main chain with an extender, (ii) a modified non-linear polyester resin prepared by chemically bonding a polyester resin prepared from an alcohol component (y) and an unsaturated carboxylic acid component (z) or (iii) a modified non-linear polyester resin prepared by chemically bonding a polyester resin prepared from an alcohol component (y) and an unsaturated carboxylic acid component (z), with a compound (b) having a radical reactive group and having a number average molecular weight of 1,000 or less by a crosslinking reaction in which carbon-carbon bonds are formed by a radical addition reaction between the compound (b) having a radical reactive group and the polyester resin. wherein G' x150 represents the storage modulus (unit: Pa) at 150°C for the tetrahydrofuran -insoluble component of the toner binder and G' y150 represents the storage modulus (unit: Pa) at 150°C of the THF-soluble component of the toner binder, wherein the toner binder satisfies Formula and Formula given below: G " x 150 / G ′ x 150 ≥ 0.1 G " y 120 / G ′ y 120 ≤ 20 wherein G" x150 represents the loss modulus (unit: Pa) at 150°C for the THF-insoluble component of the toner binder, G" y120 represents the loss modulus (unit: Pa) at 120°C of the THF-soluble component of the toner binder, G' x150 represents the storage modulus (unit: Pa) at 150°C for the THF-insoluble component of the toner binder, and G' y120 represents the storage modulus (unit: Pa) at 120°C of the THF-soluble component of the toner binder, wherein the THF-insoluble component and the THF-soluble component are obtained in accordance with the description, and the storage moduli G' x150, G' y150, G" x150, G' y120, and G" y120 are determined in accordance with the description, wherein the polyester resin comprises a non-linear polyester resin and a linear polyester resin, wherein the non-linear polyester resin is (i) a modified non-linear polyester resin produced by reacting a polyester resin having an active hydrogen on a terminal of the main chain with an extender, (ii) a modified non-linear polyester resin prepared by chemically bonding a polyester resin prepared from an alcohol component (y) and an unsaturated carboxylic acid component (z) or (iii) a modified non-linear polyester resin prepared by chemically bonding a polyester resin