PURPOSE: To allow neat accumulation of ground coffee on the bottom of a case by equipping a ground coffee case provided in connection with an outlet, and an oscillator to oscillate the ground coffee case.

CONSTITUTION: A grinding blade A5 is rotated by driving a motor 1, and this rotation power forces coffee beans into the clearance between a cutting blade A4 and a cutting blade B9. Coffee beans are ground while passing through it, and sent out of an outlet 11 provided close to the cutter into a ground coffee case 12. At this time, the case 12 is oscillated by an oscillator 13 of plunge-type solenoid, etc., intermittently or continuously. Thus, ground coffee sent out scattering is hard to leave on the wall of the case 12, and even when leaving on it, ground coffee is fallen down on the bottom of the case soon by oscillation and stayed neatly.