A toner for developing a digital-image and being fused onto a recording medium by heat and pressure, said toner comprising: a coloring agent; a first polyester resin having a softening temperature of 105.degree. C..about.112.degree. C.; a second polyester resin having a softening temperature of 150.degree. C..about.155.degree. C. wherein a mix ratio of the first resin to the second resin is between from 75/25 to 40/60 and an oxided polyolefine. Said toner has a characteristics of a high reproductivity of a digital dot image, a high fixing-strength, a wide range of an offset boundary temperature and an anti-filming property.