PURPOSE: To miniaturize both a bean grinder and the whole apparatus and reduce cost of the bean grinder without impairing flavor by cooling coffee beans in a roasting chamber with a blower just after completing roasting, dropping and guiding the roasted coffee beans from a roasting vessel through a taking out passage into the bean grinder.

CONSTITUTION: A heater 32, a rotor 14 and a driving device 36 are operated to roast coffee beans and a blower 37 is then operated to blow cool outside air on the coffee beans to rapidly air-cool the coffee beans. Viscosity of fats sticking to the surface is eliminated and surface seed coats or fine powder is simultaneously peeled and separated with winnowing action. Thereby, the aforementioned operation is sufficiently performed without impairing flavor of the roasted coffee beans to facilitate discharge of the coffee beans from a roasting vessel 31 after the roasting. Furthermore, a great force is not required even if the coffee beans are ground just after the roasting. After roasting the coffee beans in a roaster 3, a shutter device 82 is operated to open a taking outlet 81. The coffee beans in the roasting vessel 31 then drop in a taking out passage 83 by own weight thereof to enter a bean grinding chamber 42 without requiring a hopper.