A coffee beans grinder includes a main body, a dispensing component, a blade unit for grinding coffee beans having a first blade element and a second blade element facing the first blade element, and a dispensing element provided in the dispensing component for feeding coffee beans to a grinding space defined between the first blade element and the second blade element. The first blade element is provided in the main body, and the second blade element is provided in the dispensing component. The dispensing component is removably attached to the main body with a manually-operable engagement element. The second blade element faces the first blade element to define the grinding space therebetween with the dispensing component being attached to the main body with the manually-operable engagement element.