An image forming apparatus includes an image holding member, a charging device, an electrostatic charge image forming device, a developing device having a toner, a transfer device, and a fixing device, wherein the fixing device includes a fixing belt, a rotational member, and a heater; the toner contains an amorphous polyester resin as a binder resin; and the toner has a weight average molecular weight Mw and a number average molecular weight Mn, Mw is from 25000 to 60000, and Mw/Mn is from 5 to 10, and has an infrared absorption spectrometry, the ratio of absorbance for a wavelength of 1500 cm−1 to absorbance for a wavelength of 720 cm−1 is 0.6 or less, and the ratio of absorbance for a wavelength of 820 cm−1 to absorbance for a wavelength of 720 cm−1 is 0.4 or less.