Disclosed is a cyclone dust collector which separates the dust from the air utilizing a centrifugal force. The cyclone dust collector can smoothly separate the dust from the air by increasing a rotary power of the air during the introduction of the air into a collector body as well as prevent a suction impossibility due to entrance of foreign matters. To accomplish the above, the cyclone dust collector comprises: a collector body; an inlet pipe formed integrally with the collector body for sucking the dust-laden air; an outlet pipe for discharging the introduced air outwardly from the collector body; a dust outlet formed on the opposite side of the inlet pipe portion for discharging the dust contained in the air; and a cyclonic swirling part both disposing on an air introducing portion in the collector body and having a screw type vane to rotate the dust-laden air introduced into the collector body.