Abstract: A coffee machine has a container for coffee beans, a grinder to which coffee beans can be fed from the container, a filter holder into which ground coffee can be fed from the grinder via a shaft, and a supply device for hot water which can be introduced into the filter holder. In the shaft between the grinder and the filter holder a closing device is provided with a rotatable flap which is movable between an open and a closed position. The flap is rotatable about an axis which extends substantially parallel to a plane of the flap and has a seal arranged on the outer periphery. This allows the shaft to be effectively opened and closed.