PURPOSE: To allow continuous use for grinding of different kinds of coffee beans by providing an outlet for ground coffee, and a heating element to heat a grinding section at the back of the bottom of it.

CONSTITUTION: A grinding section 15 of a coffee grinder is provided with a cutter 10 driven by a motor 1, an outlet 11 for coffee ground by the cutter 10, and a heating body 16 to heat the grinding section 15 at the back of the bottom of it. Thus, after grinding of coffee is finished, the grinding section 15 is poured a proper quantity of water to clean the section 15 and the cutter 10, then the heating element 16 is energized to heat the grinding section 15, and water leaving in the grinding section 1 5 or on the cutter 10 evaporates soon; and now the dried grinding section and cutter are ready for next grinding. Thus, continuous grinding of different kinds of coffee beans is possible.