Vacuum duster with cyclone refuse collector

A vacuum cleaner having a cyclone dust collecting device for separating and collecting dust and dirt of a comparatively large particle size sucked from a suction opening of the cleaner by centrifugal force. The cyclone dust collecting device is biaxially placed against the extension pipe of the cleaner and includes a cyclone body having first and second connecting tubes connected to the extension pipe and a dirt collecting tub connected to the cyclone body to be removable. The cyclone body has an air inlet communicating with the first connecting tube and an air outlet communicating with the second connecting tube. The dirt-containing air sucked via the suction opening enters via the air inlet in a slanting direction against the cyclone body, thereby producing a whirlpool air current inside of the cyclone body. The dirt contained in the air is separated from the air by centrifugal force and is collected at the dirt collecting tub. A dirt separating grill having a plurality of holes is formed at the air outlet of the cyclone body to prevent the dust from flowing backward via the air outlet together with the air. Thereby, the dirt sucked together with the suction air is primarily collected by the cyclone dust connecting device, thus extending the period of time before replacing the paper filter. Further, it is possible to remove the collected dirt without completely separating the cyclone dust collecting device from the extension pipe.