A method of manufacturing a toner including manufacturing a coarse toner containing a binder resin and a coloring agent, and screening the coarse toner with a screen device including a top screen having an opening 5 of from 26 to 43 .mu.m and a bottom screen situated below the top screen having an opening of from 54 to 150 .mu.m to screen the coarse toner with the top screen by ultrasonic vibration and mechanical vibration at 50.degree. C. or lower, and with the bottom screen by mechanical vibration at 35.degree. C. or lower.