The toner binder of the present invention contains a crystalline resin (A) and a resin (B) that is a polyester resin or its modified resin, the polyester resin being obtained by reaction of an alcohol component (X) and a carboxylic acid component (Y) as raw materials, wherein a temperature (Tp) of the top of an endothermic peak derived from the crystalline resin (A) as measured by a differential scanning calorimeter (DSC) is in the range of 40°C to 100°C, and endothermic peak areas S 1 and S 2 during heating satisfy the following equation. S 2 / S 1 × 100 ‰¥ 35 S 1 is an area of the endothermic peak derived from the crystalline resin (A) in the first heating process, and S 2 is an area of the endothermic peak derived from the crystalline resin (A) in the second heating process, when the toner binder is heated, cooled, and heated.