Abstract: A dust-separating apparatus for a vacuum cleaner separates dust from air without a filer and without a cyclone by repeatedly colliding air and air-borne dust particles against surfaces as the air passes through the dust-separating apparatus. The dust-separating apparatus includes: an air inlet formed in an upper surface of the dust-separating apparatus; an inlet pipe coupled to the air inlet that guides dust-laden air downwardly into the dust-separating apparatus, the end of which opens just above the bottom surface of the dust-separating apparatus where dust particles collide with the bottom surface. An air outlet is formed in a sidewall of the dust-separating apparatus. One or more guide members formed inside the dust-separating apparatus prevent dust from flowing upwardly and provide surfaces against which air-borne particles can collide. A removable dust collection bin stores collected dust.