A toner, comprising a binder resin, wherein the binder resin comprises a non-linear chain non-crystalline polyester resin A, a non-crystalline polyester resin B, and a crystalline polyester resin C, wherein the toner has a glass transition temperature [Tglst (toner)] of 20°C to 50°C, where the glass transition temperature [Tglst (toner)] is measured in a first heating in differential scanning calorimetry of the toner, wherein tetrahydrofuran insoluble matter of the toner has a glass transition temperature [Tg2nd (THF insoluble matter)] of -40°C to 30°C, where the glass transition temperature [Tg2nd (THF insoluble matter)] is measured in a second heating in differential scanning calorimetry of the THF insoluble matter, wherein the THF insoluble matter has a storage modulus at 100°C [G' (THF insoluble matter)] of 1.0 × 10 5 Pa to 1.0 × 10 7 Pa, wherein a ratio of a storage modulus of the THF insoluble matter at 40°C [G' (THF insoluble matter)] to the storage modulus of the THF insoluble matter at 100°C [G' (THF insoluble matter)], expressed by [[G' (THF insoluble matter)]/[G' (THF insoluble matter)]], is 3.5 × 10 or less, wherein Tglst (toner) is measured by placing an aluminum sample container charged with 5.0 mg of a sample on a holder unit; setting the holder unit in an electric furnace; heating the sample (first heating) from -80°C to 150°C at a heating rate of 10 °C/min in a nitrogen atmosphere; cooling the sample from 150°C to -80°C at a cooling rate of 10 °C/min; again heating (second heating) to 150°C at a heating rate of 10 °C/min; measuring DSC curves for the first heating and the second heating by means of a differential scanning calorimeter; selecting the DSC curve for the first heating from the obtained DSC curve by means of an analysis program; and determining the glass transition temperature of the sample with the first heating (Tglst (toner)); wherein Tg2nd (THF insoluble matter)is measured by adding a toner (1 part by mass) to 40 parts by mass of tetrahydrofuran; refluxing the mixture for 6 hours; making the insoluble components to sediment with a centrifugal device; separating the insoluble components from a supernatant; drying the insoluble components at 40°C for 20 hours to obtain the THF insoluble matter; placing an aluminum sample container charged with 5.0 mg of the sample of THF insoluble matter on a holder unit; setting the holder unit in an electric furnace; heating the sample (first heating) from -80°C to 150°C at a heating rate of 10 °C/min in a nitrogen atmosphere; cooling the sample from 150°C to -80°C at a cooling rate of 10 °C/min; again heating (second heating) to 150°C at a heating rate of 10 °C/min; measuring DSC curves for the first heating and the second heating by means of a differential scanning calorimeter; selecting the DSC curve for the second heating; and determining the glass transition temperature of the sample with the second heating (Tg2nd (THF insoluble matter)), and wherein the storage modulus is measured using a dynamic viscoelasticity measuring device by obtaining the THF insoluble matter as set out above; forming a measurement sample of the THF insoluble matter into a pellet having a diameter of 8 mm and a thickness of 1 mm to 2 mm; fixing on a parallel plate having a diameter of 8 mm; stabilizing the sample at 40°C; heating to 200°C at a heating rate of 2.0°C/min with a frequency of 1 Hz and a strain amount of 0.1%, and measuring the storage modulus.