A vacuum cleaner brush having a case and a rotary element on which a floor cloth is attached. The rotary element is rotatably disposed on a lower portion of the case. A housing is disposed in the case, having a motor disposed therein, the motor rotatably driving the rotary element. A first and second bushing into which the driven shaft of the rotary element is provided with a blocking element protruding from a bottom surface of the case in the shape of a cylinder along a circumference of the first bushing for preventing dust and dirt from flowing into the first bushing. A ring element protrudes from an upper and inner circumference of the first bushing toward an outer circumference of the driven shaft, the ring element prevents dust and dirt from flowing into the housing. Dust and dirt are thereby prevented from flowing into the housing and damaging various components such as the motor and gears in the housing.